试题 试卷
题型:单选题 题类:常考题 难易度:容易
(解析完整) 整数、小数四则混合运算6249
40×28.2×0.025=( )
0.125×7.2={#blank#}1{#/blank#}
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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