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题型：填空题 题类：常考题 难易度：容易
9的乘法口诀1881 10
8×9{#blank#}1{#/blank#}9×9 6×6{#blank#}2{#/blank#}5×7 4×3{#blank#}3{#/blank#}6×2
72－48{#blank#}4{#/blank#}44 5×9{#blank#}5{#/blank#}54 5×1{#blank#}6{#/blank#}5＋1
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