题目内容
【题目】怎样算简便就怎样算.
6.24÷4+3.76×0.25 | 16.2×9.9+1.62 | 7.75×[20÷(3.24﹣3.04)] |
788÷12.5÷0.8 | 276.4×11﹣276.4 | 25×(4.7+4.7+4.7+4.7) |
【答案】2.5;162;775;78.8;2764;470
【解析】
试题分析:(1)(2)(5)根据乘法分配律简算即可;
(3)首先计算小括号里面的,然后计算中括号里面的,最后计算中括号外面的即可;
(4)根据除法的性质简算即可;
(6)首先求出小括号里面的,然后再根据乘法交换律和结合律计算即可.
解答:解:(1)6.24÷4+3.76×0.25
=6.24×0.25+3.76×0.25
=(6.24+3.76)×0.25
=10×0.25
=2.5
(2)16.2×9.9+1.62
=16.2×9.9+16.2×0.1
=16.2×(9.9+0.1)
=16.2×10
=162
(3)7.75×[20÷(3.24﹣3.04)]
=7.75×[20÷0.2]
=7.75×100
=775
(4)788÷12.5÷0.8
=788÷(12.5×0.8)
=788÷10
=78.8
(5)276.4×11﹣276.4
=276.4×(11﹣1)
=276.4×10
=2764
(6)25×(4.7+4.7+4.7+4.7)
=25×(4.7×4)
=25×4×4.7
=100×4.7
=470
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