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thuyduong
2 năm trước
Bài 2. Tính giá trị biểu thức sau : a) 189,2 : 11 : 2 b) (0,872 : 2,18 + 4,578 : 3,27) × 3,02 Bài 3. Tính giá trị biểu thức sau bằng cánh hợp lý : a) 45,6 : 0,1 + 45,6 × 90 b) 5,67 : 0,01 - 5,57 × 100 c) 23,4 × 5,67 × (23 × 5 - 115) d) 77,5 × 12,3 + 77,5 × 3,4 - 77,5 × 5,7 Giúp mk 2 bài này nhé
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