六七四十二 {#blank#}1{#/blank#}，{#blank#}2{#/blank#}

七九六三十{#blank#}3{#/blank#}，{#blank#}4{#/blank#}

7×{#blank#}1{#/blank#}＝14     6×{#blank#}2{#/blank#}＝42    8×{#blank#}3{#/blank#}＝56    9×{#blank#}4{#/blank#}＝18

42+39{#blank#}1{#/blank#}49+32     7×9+9{#blank#}2{#/blank#}9×9     5米{#blank#}3{#/blank#}50厘米

6×3＝                      2×1＝                       14＋8＝                      4×6＝

3×7＝                      5×9＝                       3×8＝                         74－20＝

9×817    3×972

4×832    6×64×9

□×8>40(最小填几？)