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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1798 10
六七四十二 {#blank#}1{#/blank#},{#blank#}2{#/blank#}
七九六三十{#blank#}3{#/blank#},{#blank#}4{#/blank#}
5×{#blank#}1{#/blank#}<22 {#blank#}2{#/blank#}×7<38
11>{#blank#}3{#/blank#}×6 {#blank#}4{#/blank#}×6<30
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