问题 解答题
简便运算.
3.1×2.5×45.3÷0.25÷45.2×0.5×0.2.
答案

(1)3.1×2.5×4

=3.1×(2.5×4)

=3.1×10

=31;

(2)5.3÷0.25÷4

=5.3÷(0.25×4)

=5.3÷1

=5.3;

(3)5.2×0.5×0.2

=5.2×(0.5×0.2)

=5.2×0.1

=0.52.

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