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题型:单选题 题类:常考题 难易度:容易
7的乘法口诀1810 10
4×{#blank#}1{#/blank#}<25
{#blank#}2{#/blank#}×7<29
47<{#blank#}3{#/blank#}×8
7×{#blank#}1{#/blank#}=28
6×{#blank#}2{#/blank#}=42
7×{#blank#}3{#/blank#}=63
6×9{#blank#}1{#/blank#}7×7 50-36{#blank#}2{#/blank#}50-30 8×9{#blank#}3{#/blank#}80-8
列成乘法算式:{#blank#}4{#/blank#}或者{#blank#}5{#/blank#}。
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