{#blank#}1{#/blank#}二十四  六九{#blank#}2{#/blank#}  {#blank#}3{#/blank#}二十八  {#blank#}4{#/blank#}二十八

4×7＝{#blank#}5{#/blank#}  6×9＝{#blank#}6{#/blank#}  3×8＝{#blank#}7{#/blank#}  7×9＝{#blank#}8{#/blank#}

7×4＝{#blank#}9{#/blank#}  9×6＝{#blank#}10{#/blank#}  8×3＝{#blank#}11{#/blank#}  9×7＝{#blank#}12{#/blank#}

18={#blank#}2{#/blank#}×9

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

6×7                                  6×8＝                                     6×9＝