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

3×{#blank#}3{#/blank#} ={#blank#}4{#/blank#}

口诀：{#blank#}5{#/blank#}

3×{#blank#}1{#/blank#}=18   3×{#blank#}2{#/blank#}=15    {#blank#}3{#/blank#}×5=25   6×{#blank#}4{#/blank#}=24

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=

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 =