题目内容
【题目】用你喜欢的方法计算.
5684÷28﹣21×7
()×56
8.2﹣3.54+9.8﹣7.46
.
【答案】(1)5684÷28﹣21×7
=203﹣147
=56;
(2)()×56
=×56+×56﹣×56
=32+35﹣42
=67﹣42
=25;
(3)8.2﹣3.54+9.8﹣7.46
=(8.2+9.8)﹣(3.54+7.46)
=18﹣11
=7;
(4)
=÷+
=+
=.
【解析】解:(1)5684÷28﹣21×7
=203﹣147
=56;
(2)()×56
=×56+×56﹣×56
=32+35﹣42
=67﹣42
=25;
(3)8.2﹣3.54+9.8﹣7.46
=(8.2+9.8)﹣(3.54+7.46)
=18﹣11
=7;
(4)
=÷+
=+
=.
练习册系列答案
相关题目