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题型:填空题 题类:常考题 难易度:普通
积的变化 4680
42×49=(42×)×(49÷7)
{#blank#}1{#/blank#} {#blank#}2{#/blank#} {#blank#}3{#/blank#} 1
30×180{#blank#}1{#/blank#}30×160 350÷34{#blank#}2{#/blank#}350÷35
40200{#blank#}3{#/blank#}42000 70万{#blank#}4{#/blank#}690000
5.03×0.99{#blank#}1{#/blank#}5.03 8.1×0.96{#blank#}2{#/blank#}0.81×9.6
7.48÷0.02{#blank#}3{#/blank#}7.48 3.2×10{#blank#}4{#/blank#}3.2÷0.1
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