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题型:单选题 题类:常考题 难易度:容易
用9的乘法口诀求商1999 10
{#blank#}1{#/blank#}÷3=9
{#blank#}2{#/blank#}÷4=9
{#blank#}3{#/blank#}÷9=9
{#blank#}1{#/blank#}
5×8= 7×3= 2×6= 45÷9= 5×7+6=
5×5= 56÷8= 42÷6= 81÷9= 3×7-4=
36+4= 9÷9= 72-8= 4×6= 6×0+8=
63÷7= 54÷6= 8×7-7= 6×8+12= 9×7+36=
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