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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1814 10
{#blank#}1{#/blank#}九七十二
{#blank#}2{#/blank#}
{#blank#}3{#/blank#}
例:1个9是(9),比(10)少(1).
4个9相加是{#blank#}1{#/blank#},比{#blank#}2{#/blank#}少{#blank#}3{#/blank#}.
{#blank#}1{#/blank#}×{#blank#}2{#/blank#}={#blank#}3{#/blank#}(盆)
× = × = × =
÷ = ÷ = ÷ =
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