12.8×0.95 {#blank#}1{#/blank#} 12.8 , 22.4 {#blank#}2{#/blank#} 22.4÷1.6 。
7.5÷0.99{#blank#}1{#/blank#}7.5×0.99 3.4÷1.1{#blank#}2{#/blank#}3.4×1.1
8÷0.8{#blank#}3{#/blank#}8÷0.9 0.45÷0.1{#blank#}4{#/blank#}0.45× 10