Question

37.2×0.29加3.72×7.1简便计算？

Answer 1

37.2×0.29+3.72×7.1
=3.72×10×0.29+3.72×7.1
=3.72×2.9+3.72×7.1
=3.72×(2.9+7.1)
=3.72×10
=37.2
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Answer 2

37.2×0.29+3.72×7.1
=3.72×10×0.29+3.72×7.1
=3.72×2.9+3.72×7.1
=3.72×（2.9+7.1）
=3.72×10
=37.2

Answer 3

因为37.2×0.29=3.72×10×0.29=3.72×（10×0.29）=3.72×2.9。
所以原式等于3.72×2.9+3.72×7.1，运用乘法分配律逆运算可以有3.72×（2.9+7.1）=3.72×10=37.2。

Answer 4

解:可以将37.2运用乘法分配律化为3.72x10同0.29连乘，然后提取3.72，按四则运算法则进行计算。计算过程
37.2ⅹ0.29+3.72x7.1
=3.72ⅹ10ⅹ0.29+3.72x7.1
=3.72x(2.9+7.1)
=3.72ⅹ10
=37.2

Answer 5

1. 因为37.2和3.72只相差10倍，所以可以把其中一项化成另一项，比如可以这么化：

   原式=3.72*10*0.29+3.72*7.1

   =3.72*2.9+3.72*7.1

2. 这样就可以提取3.72了

   =3.72*(2.9+7.1)

   =3.72*10

   =37.2