题目内容
【题目】计算下面各题,能简算的要简算。
25.39-(5.39+9.1) 3.7×0.25+6.3÷4 306×13-7290÷18
8.8÷22-3.2÷16
【答案】10.9;;3573;
0.2;19;25
【解析】
25.39-(5.39+9.1),根据减法性质简算;
3.7×0.25+6.3÷4,根据乘法分配律简算;
306×13-7290÷18,8.8÷22-3.2÷16,根据四则混合运算顺序;
,根据加法交换律和减法性质简算;
,根据乘法分配律简算。
25.39-(5.39+9.1)
=25.39-5.39-9.1
=20-9.1
=10.9
3.7×0.25+6.3÷4
=
=
=
=
306×13-7290÷18
=3978-405
=3573
8.8÷22-3.2÷16
=0.4-0.2
=0.2
=
=
=20-1
=19
=
=20+14-9
=25
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