{#blank#}1{#/blank#}×5=20       6×{#blank#}2{#/blank#}=18     65+{#blank#}3{#/blank#}=93

49 – {#blank#}4{#/blank#}=15     16÷{#blank#}5{#/blank#}=4       {#blank#}6{#/blank#}÷3=4

{#blank#}7{#/blank#}×1=6      {#blank#}8{#/blank#}×2=2         {#blank#}9{#/blank#}÷5=1

3×{#blank#}10{#/blank#}=9      20÷{#blank#}11{#/blank#}=5       {#blank#}12{#/blank#}×4=8

73﹣37＝      38+45＝       81﹣15＝

130+280＝    46+30＝       270﹣90＝

620+290＝    720﹣400＝     450+550＝