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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1815 9
七七
{#blank#}1{#/blank#}×{#blank#}2{#/blank#}={#blank#}3{#/blank#}
{#blank#}4{#/blank#}×{#blank#}5{#/blank#}={#blank#}6{#/blank#}
7+7+7+7{#blank#}1{#/blank#}5×6 3+3+3+3+3{#blank#}2{#/blank#}3×4+3
6×7{#blank#}3{#/blank#}7×6 7×2+14{#blank#}4{#/blank#}7+7+7+7+7
21+28{#blank#}5{#/blank#}7×7 6×7{#blank#}6{#/blank#}42-2
两个乘数都是7,积是{#blank#}1{#/blank#}?
{#blank#}1{#/blank#}
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