计算.(能简便的用简便法计算)?4.25÷0.125÷8????2.5×(6.2-2.6)×0.4????76.2÷0.16-0.160.45与2.4的积除1.62,

发布时间:2020-07-31 05:38:34

计算.(能简便的用简便法计算)
?4.25÷0.125÷8????
2.5×(6.2-2.6)×0.4????
76.2÷0.16-0.16
0.45与2.4的积除1.62,商是多少?

网友回答

解:(1)4.25÷0.125÷8,
=4.25÷(0.125×8),
=4.25÷1,
=4.25;
(2)2.5×(6.2-2.6)×0.4,
=(2.5×0.4)×3.6,
=1×3.6,
=3.6;
(3)76.2÷0.16-0.16,
=476.25-0.16,
=476.09;
(4)1.62÷(0.45×2.4),
=1.62÷1.08,
=1.5.
解析分析:(1)利用除法的性质,进行简算,即a÷b÷c=a÷(b×c);(2)利用乘法交换律和结合律简算;(3)注意运算顺序;(4)求“商”,最后一步应为除法,“除1.62”,也就是1.62做被除数.

点评:此题考查了除法的性质、乘法的交换律和结合律、运算顺序等知识,注意“除”和“除以”的区分.
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