1.5元{#blank#}1{#/blank#}10元    3.5+1.2{#blank#}2{#/blank#}5   20×30{#blank#}3{#/blank#}15×40

0.5米{#blank#}4{#/blank#}0.7米    7.2-0.8{#blank#}5{#/blank#}0.4    400÷5{#blank#}6{#/blank#}245÷5

5.16×0.18{#blank#}1{#/blank#}5.16               5.16÷0.18{#blank#}2{#/blank#}5.16 

8.9×1.02{#blank#}3{#/blank#}8.9-1.02           1.5×0.9{#blank#}4{#/blank#}0.9×1.5

320×1.5={#blank#}1{#/blank#} 0.32×0.15={#blank#}2{#/blank#}

48÷3.2={#blank#}3{#/blank#}     4.8÷15={#blank#}4{#/blank#}