试题 试卷
题型:填空题 题类:常考题 难易度:普通
小数乘整数5749 10
1.9+(12.8-3.8)×1.9=
①12.5×88
②50×9.9
③3.68×68+5.32×68+68
④7.15×24.7+7.15×75.3
2005×1.9+200.5×81.
①0.25×2.8
=0.25×(4×0.7)
=0.25×4×0.7
=1×0.7
=0.7
(应用了{#blank#}1{#/blank#}定律)
②51.25×0.8
=(50+1.25)×0.8
=50×0.8+1.25×0.8
=40+1
=41
(应用了{#blank#}2{#/blank#}定律)
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