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题型:解决问题 题类:常考题 难易度:普通
8的乘法口诀 1849 10
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4,9,16,25{#blank#}1{#/blank#},{#blank#}2{#/blank#},{#blank#}3{#/blank#},{#blank#}4{#/blank#}
{#blank#}1{#/blank#}×8<70 {#blank#}2{#/blank#}×5<45
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