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cuongnc237
2 năm trước
Bài 1:Tìm phân số có mẫu bằng 5 , biết rằng khi cộng tử với 8 , nhân mẫu với 3 thì giá trị của phân số không thay đổi. Bài 2: Rút gọn phân số quy đồng các phân số sau a, 20/45;14/-35 và -32/44 b,-15/90;120/600;-75/150 c,54/-90;-180/288;60/-135 d,3.4+3.11/9.2+3 và 8.3 - 3.2/4.7 - 2.6 Làm giúp mình nhé mình đang cần gấp
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