0.23÷0.042.3÷0.4 0.6674÷6
12.22×0.98 {#blank#}1{#/blank#}12.22 0.64÷0.8 {#blank#}2{#/blank#}64÷8
1.6+0.4 {#blank#}3{#/blank#}1.6×0.4 4.5÷0.5 {#blank#}4{#/blank#}4.5×2