Question

100.4-9.6×2.5的简便运算？

Answer 1

解:此题我认为直接按四则运算法则进行计算简便，先计算乘法，然后将100.4减去它们的积。计算过程
100.4-9.6ⅹ2.5
=100.4-24
=76.4。

Answer 2

简便运算
100.4-9.6×2.5
=100+0.4 - (10x2.5 -0.4x2.5)
=100+0.4 - (25 -1)
=100+0.4 - 24
=76.4

Answer 3

76.4

100.4-9.6×2.5

＝100.4-2.4×4×2.5

＝100.4-2.4×（4×2.5）

＝100.4-2.4×（4×2.5）

＝100＋0.4－2.4×10

＝100－24＋0.4

＝76＋0.4

＝76.4

Answer 4

100.4-9.6×2.5
=100.4-2.4×(4×2.5)
=100.4-2.4×10
=100.4-24
=76.4

Answer 5

100.4-9.6×2.5
=100+0.4-（10-0.4）×2.5
=100+0.4-2.5×10+0.4×2.5
=100-25+0.4+1
=76.4