8.3*8.3*9的简便运算
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8.3*8.3*9的简便运算
8.3*8.3*9的简便运算
8.3*8.3*9的简便运算
8.3*8.3*9
=8.3*8.3*(10-1)
=8.3*(83-8.3)
=8.3*74.7
=(10-1.7)*74.7
=747-126.99
=621.01
8.3*8.3*9的简便运算
8.3*8.3*9的简便运算
8.3*8.3*9的简便运算
8.3*8.3*9
=8.3*8.3*(10-1)
=8.3*(83-8.3)
=8.3*74.7
=(10-1.7)*74.7
=747-126.99
=621.01