Đáp án+Giải thích các bước giải:
`A= [(- 8 ) + ( - 7 ) ] + ( -10)`
`A = (-15)+(-10)`
`A = -25`
-----------------------------------------------------
`B = - ( - 299 ) + ( - 219 ) + ( -401 ) + 12`
`B = 299 - 219 - 401 +12`
`B = -309`
---------------------------------------------------
`C = 555 + ( - 100) + ( -80) + 333`
`C = 555 - 100 - 80 +333`
`C = 708`
------------------------------------------------------
`D = 347+ ( - 40 ) + 3150 + ( - 307)`
`D = 347 - 40 + 3150 - 307`
`D = 3150`
----------------------------------------------------
`E= 98 . 42 – {50 . [(18 – 2^3) : 2 + 3^2]}`
`E = 98. 42 - 50 . (10 : 2 +9)`
`E = 98 . 42 - 50 . 14`
`E = 3416`
-----------------------------------------------------
`F = - 80 - [ - 130 – ( 12 – 4 )^2] + 2021^0`
`F = -80 - (-130 - 8^2) +1`
`F = -80 + 130 + 64 + 1`
`F = 115`
-----------------------------------------------------
`H = 1024 : 2^4+ 140 : ( 38 + 2^5)- 7^23 : 7^21`
`H = 1024 : 16 + 140 : (38 + 32) - 49`
`H = 64 + 140 : 70 - 49`
`H = 64 + 2 - 49`
`H = 17`
------------------------------------------------------
`I =129-119 + 2-31`
`I = -99`
-----------------------------------------------------
`N = 160 – ( 2^3` `.5^2– 6 . 25 )`
`N = 160 - (8 . 25 - 6. 25)`
`N = 160 - 50`
`N = 110`
------------------------------------------------------
`Q = 100 + 98 + 96 + .... + 4 +2 – 97 – 95 - ….- 3 – 1`
`Q = 100 + (98 - 97) + (96 - 95) +. ...+ (4-3)+(2-1)`
`\underbrace{Q = 100 + 1 + 1 + .....+ 1 + 1}_{có 49 số 1}`
`Q = 100 + 49`
`Q = 149`
$@Pipimm~$
