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题型:填空题 题类:常考题 难易度:容易
7的乘法口诀1816 10
3,6,9,{#blank#}1{#/blank#},{#blank#}2{#/blank#}。
{#blank#}1{#/blank#}×4=0
{#blank#}2{#/blank#}×3=9
6×{#blank#}1{#/blank#}<21 7×{#blank#}2{#/blank#}<49 4×{#blank#}3{#/blank#}<27
3×{#blank#}4{#/blank#}<14 5×{#blank#}5{#/blank#}<44 6×{#blank#}6{#/blank#}<32
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