Question

4.96×12.5-49.6×0.25简便计算？

Answer 1

解:4.96×12.5-49.6×0.25=4.96×10×1.25-49.6×0.25=

49.6×1.25-49.6×0.25=49.6×(1.25-0.25)=49.6

Answer 2

4.96×12.5-49.6×0.25（找相似处）
（把49.6拆分成4.96×10）

=4.96×12.5-4.96×10×0.25
=4.96×12.5-4.96×2.5
=4.96×（12.5-2.5）

=4.96×10

=49.6

第二种算法
4.96×12.5-49.6×0.25（找相似处）
（把4.96想办法变成49.6）

=49.6×1.25-49.6×0.25

=49.6×（1.25-0.25）

=49.6×1

=49.6

Answer 3

4.96×12.5-49.6×0.25简便计算
=4.96x12.5-4.96x2.5
=4.96x（12.5-2.5）
=4.96x10
=49.6

Answer 4

分析：
咋一看，不可以简便算法。仔细一看，通过变形以后，是可以简便算法的。

计算过程：
4.96×12.5-49.6×0.25
=4.96×12.5-4.96×10×0.25
=4.96×12.5-4.96×2.5
=4.96×（12.5-2.5）
=4.96×10
=49.6

Answer 5

4.96×12.5+49.6×0.25
=4.96×12.5+4.96×2.5
=4.96×（12.5+2.5）
=4.96×15
=74.4
望采纳，谢谢！