92. Tính: a) (37 - 17) . (-5) + 23 . (-13-17) b) (-57) . ( 67 -34) - 67 . ( 34-57) 93. Tính nhanh: a) (-4) . (+125) . (-25) . (-6) . (-8) b) (-98) . ( 1 - 246) - 246 .98 96. Tính: a) 237 . (-26) + 26 . 137 b) 63 . (-25) +25 . (-23) 97. So sánh: a) (-16) . 1253 . (-8) . (-4) . (-3

duyenmup1995

6 năm trước

92. Tính:

a) (37 - 17) . (-5) + 23 . (-13-17)

b) (-57) . ( 67 -34) - 67 . ( 34-57)

93. Tính nhanh:

a) (-4) . (+125) . (-25) . (-6) . (-8)

b) (-98) . ( 1 - 246) - 246 .98

96. Tính:

a) 237 . (-26) + 26 . 137

b) 63 . (-25) +25 . (-23)

97. So sánh:

a) (-16) . 1253 . (-8) . (-4) . (-3) với 0

b) 13 . (-24) . (-15) . (-8) . 4 với 0

Các bạn giúp mik bài này nhé! Mình xin đấy!

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CMR: Nếu

góc xOz=zOy=1/2 xOy thì Oz là tia phân giác của góc xOy

1 máy in cứ giây thì in dc 1 tờ giấy, sau khi in liên tục trong 1 giờ thì cần 4 phút để nghỉ. Hỏi cần bao nhiêu PHÚT để in 3600 tờ giấy????

So sánh các phân số sau:

a) \(\frac{5}{{24}},\frac{{5 + 10}}{{24}},\frac{5}{8}\)

b) \(\frac{4}{9},\frac{{6 + 9}}{{6.9}},\frac{2}{3}\)

1 chữ số chẵn có 4 chữ số trong đó chữ số hàng trăm va chữ số hàng đơn vị lặp thành 1 số gấp 3 lần chữ số hàng nghìn và gấp 2 lần chữ số hàng đơn vị

Câu 1 : Cho biểu thức A= \(\dfrac{a^3+2a^2-1}{a^3+2a^2+2a+1}\)

a, Rút gọn biểu thức

b, Chứng minh rằng nếu a là số nguyên thì giá trị của biểu thức tìm được của câu a, là một phân số tối giản.

Câu 2:Tìm tất cả các số tự nhiên có 3 chữ số \(\overline{abc}\) sao cho \(\overline{abc}\) = \(n^2-1\) và \(\overline{cba}=\left(n-2\right)^2\)

Trả lời nhanh giùm mk câu hỏi này nhá!

Bài 1 Tìm x,y thuộc số nguyên

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Bài 2 Chứng minh

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C = 1https:https:https://LogaVN.net/image/faq/data2/710107_.https://LogaVN.net/image/faq/data2/710107_.LogaVN.nethttps://LogaVN.net/image/faq/data2/710107_.imagehttps://LogaVN.net/image/faq/data2/710107_.faqhttps://LogaVN.net/image/faq/data2/710107_.data2https://LogaVN.net/image/faq/data2/710107_.185200_.https:https://LogaVN.net/image/faq/data2/710107_.https://LogaVN.net/image/faq/data2/710107_.LogaVN.nethttps://LogaVN.net/image/faq/data2/710107_.imagehttps://LogaVN.net/image/faq/data2/710107_.faqhttps://LogaVN.net/image/faq/data2/710107_.data2https://LogaVN.net/image/faq/data2/710107_.185200_.LogaVN.nethttps:https://LogaVN.net/image/faq/data2/710107_.https://LogaVN.net/image/faq/data2/710107_.LogaVN.nethttps://LogaVN.net/image/faq/data2/710107_.imagehttps://LogaVN.net/image/faq/data2/710107_.faqhttps://LogaVN.net/image/faq/data2/710107_.data2https://LogaVN.net/image/faq/data2/710107_.185200_.imagehttps:https://LogaVN.net/image/faq/data2/710107_.https://LogaVN.net/image/faq/data2/710107_.LogaVN.nethttps://LogaVN.net/image/faq/data2/710107_.imagehttps://LogaVN.net/image/faq/data2/710107_.faqhttps://LogaVN.net/image/faq/data2/710107_.data2https://LogaVN.net/image/faq/data2/710107_.185200_.faqhttps:https://LogaVN.net/image/faq/data2/710107_.https://LogaVN.net/image/faq/data2/710107_.LogaVN.nethttps://LogaVN.net/image/faq/data2/710107_.imagehttps://LogaVN.net/image/faq/data2/710107_.faqhttps://LogaVN.net/image/faq/data2/710107_.data2https://LogaVN.net/image/faq/data2/710107_.185200_.data2https:https://LogaVN.net/image/faq/data2/710107_.https://LogaVN.net/image/faq/data2/710107_.LogaVN.nethttps://LogaVN.net/image/faq/data2/710107_.imagehttps://LogaVN.net/image/faq/data2/710107_.faqhttps://LogaVN.net/image/faq/data2/710107_.data2https://LogaVN.net/image/faq/data2/710107_.185200_.775362_.41 + 1https:https:https://LogaVN.net/image/faq/data2/710107_.https://LogaVN.net/image/faq/data2/710107_.LogaVN.nethttps://LogaVN.net/image/faq/data2/710107_.imagehttps://LogaVN.net/image/faq/data2/710107_.faqhttps://LogaVN.net/image/faq/data2/710107_.data2https://LogaVN.net/image/faq/data2/710107_.185200_.https:https://LogaVN.net/image/faq/data2/710107_.https://LogaVN.net/image/faq/data2/710107_.LogaVN.nethttps://LogaVN.net/image/faq/data2/710107_.imagehttps://LogaVN.net/image/faq/data2/710107_.faqhttps://LogaVN.net/image/faq/data2/710107_.data2https://LogaVN.net/image/faq/data2/710107_.185200_.LogaVN.nethttps:https://LogaVN.net/image/faq/data2/710107_.https://LogaVN.net/image/faq/data2/710107_.LogaVN.nethttps://LogaVN.net/image/faq/data2/710107_.imagehttps://LogaVN.net/image/faq/data2/710107_.faqhttps://LogaVN.net/image/faq/data2/710107_.data2https://LogaVN.net/image/faq/data2/710107_.185200_.imagehttps:https://LogaVN.net/image/faq/data2/710107_.https://LogaVN.net/image/faq/data2/710107_.LogaVN.nethttps://LogaVN.net/image/faq/data2/710107_.imagehttps://LogaVN.net/image/faq/data2/710107_.faqhttps://LogaVN.net/image/faq/data2/710107_.data2https://LogaVN.net/image/faq/data2/710107_.185200_.faqhttps:https://LogaVN.net/image/faq/data2/710107_.https://LogaVN.net/image/faq/data2/710107_.LogaVN.nethttps://LogaVN.net/image/faq/data2/710107_.imagehttps://LogaVN.net/image/faq/data2/710107_.faqhttps://LogaVN.net/image/faq/data2/710107_.data2https://LogaVN.net/image/faq/data2/710107_.185200_.data2https:https://LogaVN.net/image/faq/data2/710107_.https://LogaVN.net/image/faq/data2/710107_.LogaVN.nethttps://LogaVN.net/image/faq/data2/710107_.imagehttps://LogaVN.net/image/faq/data2/710107_.faqhttps://LogaVN.net/image/faq/data2/710107_.data2https://LogaVN.net/image/faq/data2/710107_.185200_.775362_.42 + - + 1https:https:https://LogaVN.net/image/faq/data2/710107_.https://LogaVN.net/image/faq/data2/710107_.LogaVN.nethttps://LogaVN.net/image/faq/data2/710107_.imagehttps://LogaVN.net/image/faq/data2/710107_.faqhttps://LogaVN.net/image/faq/data2/710107_.data2https://LogaVN.net/image/faq/data2/710107_.185200_.https:https://LogaVN.net/image/faq/data2/710107_.https://LogaVN.net/image/faq/data2/710107_.LogaVN.nethttps://LogaVN.net/image/faq/data2/710107_.imagehttps://LogaVN.net/image/faq/data2/710107_.faqhttps://LogaVN.net/image/faq/data2/710107_.data2https://LogaVN.net/image/faq/data2/710107_.185200_.LogaVN.nethttps:https://LogaVN.net/image/faq/data2/710107_.https://LogaVN.net/image/faq/data2/710107_.LogaVN.nethttps://LogaVN.net/image/faq/data2/710107_.imagehttps://LogaVN.net/image/faq/data2/710107_.faqhttps://LogaVN.net/image/faq/data2/710107_.data2https://LogaVN.net/image/faq/data2/710107_.185200_.imagehttps:https://LogaVN.net/image/faq/data2/710107_.https://LogaVN.net/image/faq/data2/710107_.LogaVN.nethttps://LogaVN.net/image/faq/data2/710107_.imagehttps://LogaVN.net/image/faq/data2/710107_.faqhttps://LogaVN.net/image/faq/data2/710107_.data2https://LogaVN.net/image/faq/data2/710107_.185200_.faqhttps:https://LogaVN.net/image/faq/data2/710107_.https://LogaVN.net/image/faq/data2/710107_.LogaVN.nethttps://LogaVN.net/image/faq/data2/710107_.imagehttps://LogaVN.net/image/faq/data2/710107_.faqhttps://LogaVN.net/image/faq/data2/710107_.data2https://LogaVN.net/image/faq/data2/710107_.185200_.data2https:https://LogaVN.net/image/faq/data2/710107_.https://LogaVN.net/image/faq/data2/710107_.LogaVN.nethttps://LogaVN.net/image/faq/data2/710107_.imagehttps://LogaVN.net/image/faq/data2/710107_.faqhttps://LogaVN.net/image/faq/data2/710107_.data2https://LogaVN.net/image/faq/data2/710107_.185200_.775362_.80

Chứng minh 7https:https:https://LogaVN.net/image/faq/data2/710107_.https://LogaVN.net/image/faq/data2/710107_.LogaVN.nethttps://LogaVN.net/image/faq/data2/710107_.imagehttps://LogaVN.net/image/faq/data2/710107_.faqhttps://LogaVN.net/image/faq/data2/710107_.data2https://LogaVN.net/image/faq/data2/710107_.185200_.https:https://LogaVN.net/image/faq/data2/710107_.https://LogaVN.net/image/faq/data2/710107_.LogaVN.nethttps://LogaVN.net/image/faq/data2/710107_.imagehttps://LogaVN.net/image/faq/data2/710107_.faqhttps://LogaVN.net/image/faq/data2/710107_.data2https://LogaVN.net/image/faq/data2/710107_.185200_.LogaVN.nethttps:https://LogaVN.net/image/faq/data2/710107_.https://LogaVN.net/image/faq/data2/710107_.LogaVN.nethttps://LogaVN.net/image/faq/data2/710107_.imagehttps://LogaVN.net/image/faq/data2/710107_.faqhttps://LogaVN.net/image/faq/data2/710107_.data2https://LogaVN.net/image/faq/data2/710107_.185200_.imagehttps:https://LogaVN.net/image/faq/data2/710107_.https://LogaVN.net/image/faq/data2/710107_.LogaVN.nethttps://LogaVN.net/image/faq/data2/710107_.imagehttps://LogaVN.net/image/faq/data2/710107_.faqhttps://LogaVN.net/image/faq/data2/710107_.data2https://LogaVN.net/image/faq/data2/710107_.185200_.faqhttps:https://LogaVN.net/image/faq/data2/710107_.https://LogaVN.net/image/faq/data2/710107_.LogaVN.nethttps://LogaVN.net/image/faq/data2/710107_.imagehttps://LogaVN.net/image/faq/data2/710107_.faqhttps://LogaVN.net/image/faq/data2/710107_.data2https://LogaVN.net/image/faq/data2/710107_.185200_.data2https:https://LogaVN.net/image/faq/data2/710107_.https://LogaVN.net/image/faq/data2/710107_.LogaVN.nethttps://LogaVN.net/image/faq/data2/710107_.imagehttps://LogaVN.net/image/faq/data2/710107_.faqhttps://LogaVN.net/image/faq/data2/710107_.data2https://LogaVN.net/image/faq/data2/710107_.185200_.775362_.12 < C < 5https:https:https://LogaVN.net/image/faq/data2/710107_.https://LogaVN.net/image/faq/data2/710107_.LogaVN.nethttps://LogaVN.net/image/faq/data2/710107_.imagehttps://LogaVN.net/image/faq/data2/710107_.faqhttps://LogaVN.net/image/faq/data2/710107_.data2https://LogaVN.net/image/faq/data2/710107_.185200_.https:https://LogaVN.net/image/faq/data2/710107_.https://LogaVN.net/image/faq/data2/710107_.LogaVN.nethttps://LogaVN.net/image/faq/data2/710107_.imagehttps://LogaVN.net/image/faq/data2/710107_.faqhttps://LogaVN.net/image/faq/data2/710107_.data2https://LogaVN.net/image/faq/data2/710107_.185200_.LogaVN.nethttps:https://LogaVN.net/image/faq/data2/710107_.https://LogaVN.net/image/faq/data2/710107_.LogaVN.nethttps://LogaVN.net/image/faq/data2/710107_.imagehttps://LogaVN.net/image/faq/data2/710107_.faqhttps://LogaVN.net/image/faq/data2/710107_.data2https://LogaVN.net/image/faq/data2/710107_.185200_.imagehttps:https://LogaVN.net/image/faq/data2/710107_.https://LogaVN.net/image/faq/data2/710107_.LogaVN.nethttps://LogaVN.net/image/faq/data2/710107_.imagehttps://LogaVN.net/image/faq/data2/710107_.faqhttps://LogaVN.net/image/faq/data2/710107_.data2https://LogaVN.net/image/faq/data2/710107_.185200_.faqhttps:https://LogaVN.net/image/faq/data2/710107_.https://LogaVN.net/image/faq/data2/710107_.LogaVN.nethttps://LogaVN.net/image/faq/data2/710107_.imagehttps://LogaVN.net/image/faq/data2/710107_.faqhttps://LogaVN.net/image/faq/data2/710107_.data2https://LogaVN.net/image/faq/data2/710107_.185200_.data2https:https://LogaVN.net/image/faq/data2/710107_.https://LogaVN.net/image/faq/data2/710107_.LogaVN.nethttps://LogaVN.net/image/faq/data2/710107_.imagehttps://LogaVN.net/image/faq/data2/710107_.faqhttps://LogaVN.net/image/faq/data2/710107_.data2https://LogaVN.net/image/faq/data2/710107_.185200_.775362_.6

Bài 4 Tìm n thuộc số nguyên biết :

A = 19https:https:https://LogaVN.net/image/faq/data2/710107_.https://LogaVN.net/image/faq/data2/710107_.LogaVN.nethttps://LogaVN.net/image/faq/data2/710107_.imagehttps://LogaVN.net/image/faq/data2/710107_.faqhttps://LogaVN.net/image/faq/data2/710107_.data2https://LogaVN.net/image/faq/data2/710107_.185200_.https:https://LogaVN.net/image/faq/data2/710107_.https://LogaVN.net/image/faq/data2/710107_.LogaVN.nethttps://LogaVN.net/image/faq/data2/710107_.imagehttps://LogaVN.net/image/faq/data2/710107_.faqhttps://LogaVN.net/image/faq/data2/710107_.data2https://LogaVN.net/image/faq/data2/710107_.185200_.LogaVN.nethttps:https://LogaVN.net/image/faq/data2/710107_.https://LogaVN.net/image/faq/data2/710107_.LogaVN.nethttps://LogaVN.net/image/faq/data2/710107_.imagehttps://LogaVN.net/image/faq/data2/710107_.faqhttps://LogaVN.net/image/faq/data2/710107_.data2https://LogaVN.net/image/faq/data2/710107_.185200_.imagehttps:https://LogaVN.net/image/faq/data2/710107_.https://LogaVN.net/image/faq/data2/710107_.LogaVN.nethttps://LogaVN.net/image/faq/data2/710107_.imagehttps://LogaVN.net/image/faq/data2/710107_.faqhttps://LogaVN.net/image/faq/data2/710107_.data2https://LogaVN.net/image/faq/data2/710107_.185200_.faqhttps:https://LogaVN.net/image/faq/data2/710107_.https://LogaVN.net/image/faq/data2/710107_.LogaVN.nethttps://LogaVN.net/image/faq/data2/710107_.imagehttps://LogaVN.net/image/faq/data2/710107_.faqhttps://LogaVN.net/image/faq/data2/710107_.data2https://LogaVN.net/image/faq/data2/710107_.185200_.data2https:https://LogaVN.net/image/faq/data2/710107_.https://LogaVN.net/image/faq/data2/710107_.LogaVN.nethttps://LogaVN.net/image/faq/data2/710107_.imagehttps://LogaVN.net/image/faq/data2/710107_.faqhttps://LogaVN.net/image/faq/data2/710107_.data2https://LogaVN.net/image/faq/data2/710107_.185200_.775362_.n-1 nhân nhttps:https:https://LogaVN.net/image/faq/data2/710107_.https://LogaVN.net/image/faq/data2/710107_.LogaVN.nethttps://LogaVN.net/image/faq/data2/710107_.imagehttps://LogaVN.net/image/faq/data2/710107_.faqhttps://LogaVN.net/image/faq/data2/710107_.data2https://LogaVN.net/image/faq/data2/710107_.185200_.https:https://LogaVN.net/image/faq/data2/710107_.https://LogaVN.net/image/faq/data2/710107_.LogaVN.nethttps://LogaVN.net/image/faq/data2/710107_.imagehttps://LogaVN.net/image/faq/data2/710107_.faqhttps://LogaVN.net/image/faq/data2/710107_.data2https://LogaVN.net/image/faq/data2/710107_.185200_.LogaVN.nethttps:https://LogaVN.net/image/faq/data2/710107_.https://LogaVN.net/image/faq/data2/710107_.LogaVN.nethttps://LogaVN.net/image/faq/data2/710107_.imagehttps://LogaVN.net/image/faq/data2/710107_.faqhttps://LogaVN.net/image/faq/data2/710107_.data2https://LogaVN.net/image/faq/data2/710107_.185200_.imagehttps:https://LogaVN.net/image/faq/data2/710107_.https://LogaVN.net/image/faq/data2/710107_.LogaVN.nethttps://LogaVN.net/image/faq/data2/710107_.imagehttps://LogaVN.net/image/faq/data2/710107_.faqhttps://LogaVN.net/image/faq/data2/710107_.data2https://LogaVN.net/image/faq/data2/710107_.185200_.faqhttps:https://LogaVN.net/image/faq/data2/710107_.https://LogaVN.net/image/faq/data2/710107_.LogaVN.nethttps://LogaVN.net/image/faq/data2/710107_.imagehttps://LogaVN.net/image/faq/data2/710107_.faqhttps://LogaVN.net/image/faq/data2/710107_.data2https://LogaVN.net/image/faq/data2/710107_.185200_.data2https:https://LogaVN.net/image/faq/data2/710107_.https://LogaVN.net/image/faq/data2/710107_.LogaVN.nethttps://LogaVN.net/image/faq/data2/710107_.imagehttps://LogaVN.net/image/faq/data2/710107_.faqhttps://LogaVN.net/image/faq/data2/710107_.data2https://LogaVN.net/image/faq/data2/710107_.185200_.775362_.9 sao cho thuộc số nguyên

Bài 5 Tính

A) 1https:https:https://LogaVN.net/image/faq/data2/710107_.https://LogaVN.net/image/faq/data2/710107_.LogaVN.nethttps://LogaVN.net/image/faq/data2/710107_.imagehttps://LogaVN.net/image/faq/data2/710107_.faqhttps://LogaVN.net/image/faq/data2/710107_.data2https://LogaVN.net/image/faq/data2/710107_.185200_.https:https://LogaVN.net/image/faq/data2/710107_.https://LogaVN.net/image/faq/data2/710107_.LogaVN.nethttps://LogaVN.net/image/faq/data2/710107_.imagehttps://LogaVN.net/image/faq/data2/710107_.faqhttps://LogaVN.net/image/faq/data2/710107_.data2https://LogaVN.net/image/faq/data2/710107_.185200_.LogaVN.nethttps:https://LogaVN.net/image/faq/data2/710107_.https://LogaVN.net/image/faq/data2/710107_.LogaVN.nethttps://LogaVN.net/image/faq/data2/710107_.imagehttps://LogaVN.net/image/faq/data2/710107_.faqhttps://LogaVN.net/image/faq/data2/710107_.data2https://LogaVN.net/image/faq/data2/710107_.185200_.imagehttps:https://LogaVN.net/image/faq/data2/710107_.https://LogaVN.net/image/faq/data2/710107_.LogaVN.nethttps://LogaVN.net/image/faq/data2/710107_.imagehttps://LogaVN.net/image/faq/data2/710107_.faqhttps://LogaVN.net/image/faq/data2/710107_.data2https://LogaVN.net/image/faq/data2/710107_.185200_.faqhttps:https://LogaVN.net/image/faq/data2/710107_.https://LogaVN.net/image/faq/data2/710107_.LogaVN.nethttps://LogaVN.net/image/faq/data2/710107_.imagehttps://LogaVN.net/image/faq/data2/710107_.faqhttps://LogaVN.net/image/faq/data2/710107_.data2https://LogaVN.net/image/faq/data2/710107_.185200_.data2https:https://LogaVN.net/image/faq/data2/710107_.https://LogaVN.net/image/faq/data2/710107_.LogaVN.nethttps://LogaVN.net/image/faq/data2/710107_.imagehttps://LogaVN.net/image/faq/data2/710107_.faqhttps://LogaVN.net/image/faq/data2/710107_.data2https://LogaVN.net/image/faq/data2/710107_.185200_.775362_.3 + 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Rút gọn biểu thức \(A=1\frac{1}{2}\times1\frac{1}{3}\times\frac{1}{4}\times...\times1\frac{1}{2015}\)

lớp 6a và lớp 6b được giao chuyển cát vào hố nhảy của sân thể dục. Nếu một mình lớp 6A thực hiện thì sau 4 giờ thì xong công việc, nếu một mình lớp 6B thực hiện chỉ trong 3 giờ là xong công việc. Do việc học bù của các lớp không giống nhau nên một mình 6B chitr chuyển cát được 2 giờ thì bàn giao phần công việc còn lại cho lớp 6A hoàn thiện hết. Hỏi sau bao nhiêu lâu thì lớp 6A hoàn thiện việc chuyển cát vào hố nhảy?

Chứng minh rằng với mọi \(n\in N\); \(n\ge2\) ta có :

\(\dfrac{3}{9.14}+\dfrac{3}{14.19}+=--+\dfrac{3}{\left(5n-1\right)\left(5n+4\right)}< \dfrac{1}{15}\)

Bài 1:Trên cùng một nửa mặt phẳng bờ chứa tia Õ, vẽ hai tia Ot và Oy sao cho góc xOt = 350 và góc xoy = 700

a) Tính góc tOy

b) Tia Ot có là ttia phân giác của góc xOy không ? Vì sao?

c) Gọi Om là tia đối của tia Ot. Tính số đo góc mOy

Bài 2: Cho góc COD = 800 , vẽ tia OE nằm giữa hai tia OC và OD sao cho góc COE = 600 . Vẽ tia phân giác OF của góc COD

a)Tính góc EOF ?

b) Chứng minh rằng OE la tia phân giác của góc DOF ?

Các bạn vẽ hình hộ mình lun nha!!!

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