20平方千米{#blank#}1{#/blank#}2999公顷     6500÷500{#blank#}2{#/blank#}65÷5

85万{#blank#}3{#/blank#}850001       120×50{#blank#}4{#/blank#}12×500

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

5.66÷5.8{#blank#}1{#/blank#}5.66        0.37÷0.25{#blank#}2{#/blank#}0.37

4.8×0.8{#blank#}3{#/blank#}4.8           1.8÷0.4{#blank#}4{#/blank#}1.8÷4

○

3.17×0.625○0.317×6.25

36.2×0.92○36.2

7.8÷1.2○0.78÷0.12