2×0.8=          2.5×2=          0.5×0.09=         4.5×0.1=

7.2÷0.9=       8.1÷0.3=        21÷0.07=          0÷12.5=

2.4×3.6＝{#blank#}1{#/blank#}         0.24×360＝{#blank#}2{#/blank#}             {#blank#}3{#/blank#}×0.36＝86.4

864÷3.6＝{#blank#}4{#/blank#}         8.64÷{#blank#}5{#/blank#}＝2.4           86.4÷3.6＝{#blank#}6{#/blank#}

3.14×0.14{#blank#}1{#/blank#}3.14              3.14÷0.41{#blank#}2{#/blank#}3.14

7.8×1.14{#blank#}3{#/blank#}7.8-1.14           7.8÷4.11{#blank#}4{#/blank#}7.8÷1.14

     8.64÷3.2=      3.69÷1.7≈(保留两位小数)