Question

10.8×42.3×1.25-1.25×4.23×28简便运算怎么做？

Answer 1

巧算10.8×42.3×1.25-1.25×4.23×28
解题思路：计算一元一次方程，需要将未知数移动到左边常数移动到右边，完成移动后最终算出未知数的结果。
解题过程：
10.8×42.3×1.25-1.25×4.23×28
=(108-28)×(4.23×1.25)
=80×1.25×4.23
=100×4.23
=423
存疑请追问满意请采纳

Answer 2

解：原式=108×4.23×1.25-1.25×4.23×28
=（108-28）×1.25×4.23
=80×1.25×4.23
=100×4.23
=423

Answer 3

=108*4.23*1.25-1.25*4.23*28
=（108-28）*1.25*4.23
=80*1.25*4.23
=100*4.23
=423
第一步用积的变化规律，第二部用乘法分配律。

Answer 4

10.8×42.3×1.25-1.25×4.23×28
=10.8×42.3×1.25-1.25×42.3×2.8
=42.3×1.25×（10.8-2.8）
=42.3×1.25×8
=42.3×10
=423

Answer 5

原式
=10.8×1.25×42.3-2.8×1.25×42.3
=(10.8-2.8)×1.25×42.3
=8×1.25×42.3
=10×42.3
=423