问题 解答题
脱式计算.
25×4×3.2           
32×3.2×0.7         4.4×0.4×0.4
2×0.7×3.3                             0.125×32×2.5.
答案

(1)25×4×3.2

=100×3.2

=320;           

(2)32×3.2×0.7

=102.4×0.7

=71.68;         

(3)4.4×0.4×0.4

=1.76×0.4,

=0.704;

(4)2×0.7×3.3

=1.4×3.3

=4.62;                             

(5)0.125×32×2.5

=0.125×(8×4)×2.5

=(0.125×8)×(4×2.5)

=1×10

=10.

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