4，8，12，{#blank#}1{#/blank#}，{#blank#}2{#/blank#}，{#blank#}3{#/blank#}．

56，52，{#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#}，{#blank#}10{#/blank#}，8，4，0．

4个8相加是多少？

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

{#blank#}1{#/blank#}×{#blank#}2{#/blank#}=12

{#blank#}3{#/blank#}÷{#blank#}4{#/blank#}={#blank#}5{#/blank#}

{#blank#}6{#/blank#}÷{#blank#}7{#/blank#}={#blank#}8{#/blank#}

3×4=     2×1=     4+4=      5×3=         35+18=

4×4=     3×2=    60+35=     89-26=       3×6=

2×8=     3×4=     6×5=      19+21=       75-36=

3×=12          4×=36          ×8=24