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题型:单选题 题类:常考题 难易度:普通
9的乘法口诀1873 10
{#blank#}1{#/blank#}×4<39 32>{#blank#}2{#/blank#}×4 8×{#blank#}3{#/blank#}<35 20>{#blank#}4{#/blank#}×3
四八{#blank#}1{#/blank#} {#blank#}2{#/blank#}×{#blank#}3{#/blank#}={#blank#}4{#/blank#}
四九{#blank#}5{#/blank#} {#blank#}6{#/blank#}×{#blank#}7{#/blank#}={#blank#}8{#/blank#}
三四十二
{#blank#}1{#/blank#}×3,{#blank#}2{#/blank#}×4
3×5= 80-3= 30+49= 6×3= 99-4=
23+8= 4×3= 7+55= 3×1= 6×2=
4×6= 34-6= 5×5= 4×2= 4×5=
18+7+9= 2×3+30= 60-15+7=
2+6+13= 5×6-6= 24+7-8=
6×6-9= 5×2+19= 5×8+8=
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