加法算式：{#blank#}1{#/blank#}＋{#blank#}2{#/blank#}＋{#blank#}3{#/blank#}＋{#blank#}4{#/blank#}＝{#blank#}5{#/blank#}(人)

乘法算式：{#blank#}6{#/blank#}×{#blank#}7{#/blank#}＝{#blank#}8{#/blank#}(人)

7×4={#blank#}1{#/blank#}

8×9={#blank#}2{#/blank#}

6×5=          4×5=          4×4=          4×3=

3×3=            2×6=            4×2=            5×5=

5×6+5=         6×6-3=            3×5-6=            78-6×3=

39>5×{#blank#}1{#/blank#}         6×{#blank#}2{#/blank#}<50

{#blank#}3{#/blank#}×7<67         4×{#blank#}4{#/blank#}<25