问题 解答题

脱式计算,能简算的要简算.

99×0.625+0.625

88×125

72×125

250×13×4.

答案

(1)99×0.625+0.625

=(99+1)×0.625

=100×0.625

=62.5;

(2)88×125

=11×8×125

=11×(8×125)

=11×1000

=11000;

(3)72×125

=9×8×125

=9×(8×125)

=9×1000

=9000;

(4)250×13×4

=(250×4)×13

=1000×13

=13000.

单项选择题
单项选择题