Question

0.25×4.8×5/4用简便运算计算？

Answer 1

运用乘法结合律改变运算顺序结果保持不变，所以原式等于0.25×（4.8×5/4）=0.25×（1.2×5）=1.5

Answer 2

0.25×4.8×5/4用简便运算计算具体过程如下：
0.25×4.8×5/4
=0.25×4.8×1.25 ——把5/4化成小数1.25
=0.25×6×0.8×1.25 ——把4.8分解成（6×0.8）
=（0.25×6）×（0.8×1.25） ——运用乘法结合律
=1.5×1
=1.5

Answer 3

0.25×4.8×5/4
=0.25×4.8×1.25
=0.25×(0.6×8)×1.25
=0.25×0.6×(8×1.25)
=0.15×10
=1.5

Answer 4

计算如下：
0.25×4.8×5/4
=0.25×4×1.2/4×5
=1.2/4×5
=0.3×5
=1.5