试题 试卷
题型:判断题 题类:常考题 难易度:普通
小数与整数4
78.5×(100+2)
=78.5×100+78.5
=7850+78.5
=7928.5
3.75×2.1+7.9×3.75
=3.75×(2.1+7.9)
=3.75×10
=37.5
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