{#blank#}1{#/blank#}                 {#blank#}2{#/blank#}

80×30{#blank#}1{#/blank#}240            89×11{#blank#}2{#/blank#}98×9         24×28{#blank#}3{#/blank#}12×56

33×22{#blank#}4{#/blank#}32×23         37×56{#blank#}5{#/blank#}56×37        43×22{#blank#}6{#/blank#}23×42

16×40=         50×60=         15×50=          203×3≈

420÷7=         0÷270=          560÷8=         715÷9≈

80÷4=           0÷5=            400÷5=               320÷8=

96÷3=           25×40=          0×24=                90×30=

213÷7≈           278÷7≈           59÷6≈              49×31≈