用简便方法计算.9×37+9×630.9+1.08+0.92+0.18×5×125×401.38+1.75+0.25.

发布时间:2020-07-31 16:15:50

用简便方法计算.
9×37+9×63
0.9+1.08+0.92+0.1
8×5×125×40
1.38+1.75+0.25.

网友回答

解:(1)9×37+9×63,
=9×(37+63),
=9×100,
=900;

(2)0.9+1.08+0.92+0.1,
=(0.9+0.1)+(1.08+0.92),
=1+2,
=3;

(3)8×5×125×40,
=(8×125)×(5×40),
=1000×200,
=200000;

(4)1.38+1.75+0.25,
=1.38+(1.75+0.25),
=1.38+2,
=3.38.

解析分析:(1)运用乘法分配律简算;(2)运用加法交换律与结合律简算;(3)运用乘法交换律与结合律简算;(4)运用加法结合律简算.

点评:完成本题要注意分析式中数据,运用合适的简便方法计算.
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