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题型:单选题 题类:常考题 难易度:容易
9的乘法口诀1892 10
四九{#blank#}1{#/blank#} 五{#blank#}2{#/blank#}四十五 {#blank#}3{#/blank#}九七十二
三{#blank#}4{#/blank#}二十七 六{#blank#}5{#/blank#}四十八 {#blank#}6{#/blank#}七二十八
4×{#blank#}1{#/blank#}<30 {#blank#}2{#/blank#}×8<40
9×{#blank#}3{#/blank#}<46 {#blank#}4{#/blank#}×5<37
{#blank#}1{#/blank#}×3<21 {#blank#}2{#/blank#}×6<37 19>{#blank#}3{#/blank#}×2
{#blank#}4{#/blank#}×7<23 {#blank#}5{#/blank#}×4<33 13>{#blank#}6{#/blank#}×3
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