7×{#blank#}1{#/blank#}=35，

5× 5   ={#blank#}2{#/blank#}

四七二十八

{#blank#}1{#/blank#}×7={#blank#}2{#/blank#}

{#blank#}3{#/blank#}×4={#blank#}4{#/blank#}

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

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

4×6{#blank#}1{#/blank#}5×5       34－20{#blank#}2{#/blank#}4×4      3×3{#blank#}3{#/blank#}6

5＋16{#blank#}4{#/blank#}5×6      2＋2{#blank#}5{#/blank#}2×2        1米{#blank#}6{#/blank#}50厘米＋60厘米

2×4 {#blank#}1{#/blank#} 6           1×5 {#blank#}2{#/blank#} 5             4×5 {#blank#}3{#/blank#} 25

24+36 {#blank#}4{#/blank#} 50        36+35+20 {#blank#}5{#/blank#} 90     23+20+50{#blank#}6{#/blank#}93