15×6={#blank#}2{#/blank#}

42×4={#blank#}3{#/blank#}

28×3={#blank#}4{#/blank#}

97×2＝{#blank#}1{#/blank#}            25×4＝{#blank#}2{#/blank#}              45×6＝{#blank#}3{#/blank#}

37×5＝{#blank#}4{#/blank#}            89×10＝{#blank#}5{#/blank#}             65×4＝{#blank#}6{#/blank#}

35×9＝{#blank#}7{#/blank#}            46×4＝{#blank#}8{#/blank#}              33×6＝{#blank#}9{#/blank#}

83×9＝{#blank#}10{#/blank#}            64×7＝{#blank#}11{#/blank#}              78×8＝{#blank#}12{#/blank#}

15×3{#blank#}1{#/blank#}3×15       250÷5{#blank#}2{#/blank#}280÷4

300÷6{#blank#}3{#/blank#}70×5      24×4{#blank#}4{#/blank#}42×2