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题型:填空题 题类:常考题 难易度:普通
积的变化 4674
310×25={#blank#}1{#/blank#}; 310×250={#blank#}2{#/blank#}.
5.31×1.8{#blank#}1{#/blank#}5.31
3.9÷1.8{#blank#}2{#/blank#}3.9
7.6×1.2{#blank#}3{#/blank#}7.6÷1.2
4.5÷0.5{#blank#}4{#/blank#}4.5×2.
4.89×1.23{#blank#}1{#/blank#}4.89 9.63÷30{#blank#}2{#/blank#}0.321 5.45÷3.2{#blank#}3{#/blank#}5.45
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