{#blank#}1{#/blank#}×5=15       6×{#blank#}2{#/blank#} =24    {#blank#}3{#/blank#}×4=20

{#blank#}4{#/blank#}六十二       五{#blank#}5{#/blank#}二十五

2×5 =      4 × 6 =       5 ×3 =       8 ×5 = 

5 +5 =       5×5 =        3 × 5=       2 ×9 =

7×4 =      3×6 =         6×5 =        4 ×1=

4× 8 =     7 ×3 =       4 × 4 =       4 + 4 =

18 {#blank#}1{#/blank#}3=15     30 {#blank#}2{#/blank#}6=5

10 {#blank#}3{#/blank#}5=2    4 {#blank#}4{#/blank#}5=20

18 {#blank#}5{#/blank#}6=24   2 {#blank#}6{#/blank#}2=4

24 {#blank#}7{#/blank#}6=4    4 {#blank#}8{#/blank#}4=1

三六十八  {#blank#}1{#/blank#}、{#blank#}2{#/blank#}。

二五一十  {#blank#}3{#/blank#}、{#blank#}4{#/blank#}。