{#blank#}1{#/blank#}÷3＝9

{#blank#}2{#/blank#}÷4＝9

{#blank#}3{#/blank#}÷9＝9

56÷{#blank#}1{#/blank#}=8    3×3=72÷{#blank#}2{#/blank#}   {#blank#}3{#/blank#}÷8=8   {#blank#}4{#/blank#}÷{#blank#}5{#/blank#}=7÷7

7×2＝           45÷5＝       32＋28＝     700－300＝

300＋600＝     830－700＝    57－19＝     27＋35＝

150＋60＝      3700－2500＝      4×9＝      49÷8＝

1600＋700＝      7×5＝     4＋7×3＝      51÷7＝

{#blank#}1{#/blank#}×{#blank#}2{#/blank#}={#blank#}3{#/blank#}

{#blank#}4{#/blank#}÷{#blank#}5{#/blank#}={#blank#}6{#/blank#}

{#blank#}7{#/blank#}÷{#blank#}8{#/blank#}={#blank#}9{#/blank#}

乘法口诀：{#blank#}10{#/blank#}

32÷4       54÷9       45÷5        42÷6

{#blank#}1{#/blank#}<{#blank#}2{#/blank#}<{#blank#}3{#/blank#}<{#blank#}4{#/blank#}。