问题 解答题

用简便方法计算

392.6×192-39260×0.93;25×23-30×2.5.

答案

(1)392.6×192-39260×0.93

=39260×1.92-39260×0.93

=39260×(1.92-0.93)

=39260×0.9

=39260×(1-0.1)

=39060-39260×0.1

=39260-3926

=35334;

(2)25×23-30×2.5

=25×23-3×(10×2.5)

=25×23-3×25

=25×(23-3)

=25×20

=500.

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