1.11×9.9＋8.88×8.9怎么简算?

题目

1.11×9.9＋8.88×8.9怎么简算?
八分之七乘八的多少?

答案

1.11×9.9+8.88×8.9

=1.11×9.9+1.11×8×8.9

=1.11×(9.9+71.2)

=1.11×81.1

=90.021

7/8×8=7

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