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题型：填空题 题类：常考题 难易度：普通
9的乘法口诀1861 10
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{#blank#}1{#/blank#}×7＜50 5×{#blank#}2{#/blank#}＜43 28＞{#blank#}3{#/blank#}×6
试题篮
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