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题型:填空题 题类:常考题 难易度:困难
7的乘法口诀1808 10
×4<25 34>5×
7×<30 ×7<16
{#blank#}1{#/blank#}×{#blank#}2{#/blank#}={#blank#}3{#/blank#}或{#blank#}4{#/blank#}×{#blank#}5{#/blank#}={#blank#}6{#/blank#}
3只 {#blank#}2{#/blank#}个点,4只 {#blank#}3{#/blank#}个点,
5只 {#blank#}4{#/blank#}个点,6只 {#blank#}5{#/blank#}个点,
7只 {#blank#}6{#/blank#}个点,8只 {#blank#}7{#/blank#}个点。
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