问题 解答题

简便运算:

32×1.25×2.5

4.4×5.8+5.6×5.8.

答案

(1)32×1.25×2.5,

=(8×1.25)×(2.5×4),

=10×10,

=100;

(2)4.4×5.8+5.6×5.8,

=(4.4+5.6)×5.8,

=10×5.8,

=58.

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