问题 解答题
怎样简便怎样算.
0×9+8
9×9+798×9+6987×9+5.
答案

(1)0×9+8

=0+8

=8;

(2)9×9+7

=81+7

=88;

(3)98×9+6

=882+6

=888;

(4)987×9+5

=8883+5

=8888.

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