1.98*9.9简便运算
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1.98*9.9简便运算
1.98*9.9简便运算
1.98*9.9简便运算
1.98×9.9
=1.98×(10-0.1)
=1.98×10-1.98×0.1
=19.8-0.198
=19.602
1.98*9.9简便运算
1.98*9.9简便运算
1.98*9.9简便运算
1.98×9.9
=1.98×(10-0.1)
=1.98×10-1.98×0.1
=19.8-0.198
=19.602