问题 填空题
用简便方法计算.
12.5×32×0.25
36.7×10.13.7×5.4+4.6×3.7.
答案

(1)12.5×32×0.25

=12.5×(4×8)×0.25

=(12.5×8)×(4×2.5)

=100×10

=1000;

(2)36.7×10.1

=36.7×(10+0.1)

=36.7×10+36.7×0.1

=367+3.67

=370.67;

(3)3.7×5.4+4.6×3.7

=3.7×(5.4+4.6)

=3.7×10

=37.

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