4.05-2.86-0.1475×60%+24×1375+450÷18×25120÷[()×]()÷×8÷[()×].

发布时间:2020-08-08 12:51:37

4.05-2.86-0.14
75×60%+24×
1375+450÷18×25
120÷[()×]
()÷×
8÷[()×].

网友回答

解:(1)4.05-2.86-0.14
=4.05-(2.86+0.14),
=4.05-3,
=1.05;
(2)75×60%+24×+0.6
=75×0.6+24×0.6+0.6,
=(75+24+1)×0.6,
=100×0.6,
=60;
(3)1375+450÷18×25
=1375+25×25,
=1375+625,
=2000;
(4)
=120,
=120,
=120×,
=160;
(5)
=,
=,
=,
=;
(6)
=,
=,
=30.
解析分析:(1)4.05-2.86-0.14利用a-b-c=a-(b+c)进行计算,
(2)75×60%+24×+0.6利用乘法分配律进行计算,
(3、(6)可按运算顺序计算,
(4)利用乘法分配律进行计算,
(5)利用乘法分配律进行计算.

点评:考查学生在四则运算中合理运用简便计算的能力.
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