试题 试卷
题型:填空题 题类:常考题 难易度:普通
7的乘法口诀1797 11
7+7+7+75×6 3+3+3+3+33×4+3
6×77×6 7×2+147+7+7+7+7
21+287×7 6×742-2
口诀:( )
7×{#blank#}1{#/blank#}=14
{#blank#}2{#/blank#}×3=21
{#blank#}3{#/blank#}×7=7
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