0.72×2={#blank#}1{#/blank#}

0.5÷0.25={#blank#}2{#/blank#}

4÷0.2={#blank#}3{#/blank#}

5.4－4.5={#blank#}4{#/blank#}

2.5×0.4=        1÷2=

0.013÷0.13=     20÷0.2=

1-0.8×0.9=      7.81-1.7-0.3=

2×1.3×0.5=     3.7+3.7×9=

0.78×0.8{#blank#}1{#/blank#}0.78            12.5×0.6{#blank#}2{#/blank#}12.5

0.78×1{#blank#}3{#/blank#}0.78               12.5×1{#blank#}4{#/blank#}12.5

0.78×1.1{#blank#}5{#/blank#}0.78             12.5×3.7{#blank#}6{#/blank#}12.5

          7.6÷0.9◯7.6×0.9      15.8÷0.8◯15.8          8000平方米◯8公顷

                    23.4÷3.75◯23.4       340公顷◯3.4平方千米