试题 试卷
题型：填空题 题类：常考题 难易度：容易
9的乘法口诀1857 10
{#blank#}1{#/blank#}×9＝54
1×{#blank#}2{#/blank#}＝7
8×{#blank#}3{#/blank#}＝48
{#blank#}1{#/blank#}×4<23 {#blank#}2{#/blank#}×7 <57
5×{#blank#}3{#/blank#}<28 60＞{#blank#}4{#/blank#}×9
9×{#blank#}1{#/blank#}<30 72>9×{#blank#}2{#/blank#}
9×{#blank#}3{#/blank#}<7×7+1 8×8-4>{#blank#}4{#/blank#}×9
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