8×8={#blank#}1{#/blank#}

鸭有{#blank#}1{#/blank#}只，鹅有{#blank#}2{#/blank#}只.

4×{#blank#}1{#/blank#}<30       {#blank#}2{#/blank#}×8<40

9×{#blank#}3{#/blank#}<46       {#blank#}4{#/blank#}×5<37

{#blank#}1{#/blank#}×7＜50       5×{#blank#}2{#/blank#}＜43      28＞{#blank#}3{#/blank#}×6

{#blank#}1{#/blank#}×4=32              5×{#blank#}2{#/blank#}=35             6×{#blank#}3{#/blank#}=42

{#blank#}4{#/blank#}×2=14              8×{#blank#}5{#/blank#}=48             {#blank#}6{#/blank#}×7=49