250的4倍是{#blank#}2{#/blank#}

2500的4倍是{#blank#}3{#/blank#}

6.54×10.1=66054                65.4×0.101=66054

0.654×1.01=66054              6.54×0.0101=66054

6.54×1010=66054               65.4×10100=66054

7.3×0.8{#blank#}1{#/blank#}7.3+0.8         1.24×3.5{#blank#}2{#/blank#}1.24

8.7÷0.85{#blank#}3{#/blank#}8.7             7.85+0.25{#blank#}4{#/blank#}78.5+2.5

5.24×0.99{#blank#}1{#/blank#}5.24         10.65÷0.22{#blank#}2{#/blank#}10.65

1÷0.125{#blank#}3{#/blank#}0.125×1       a×10{#blank#}4{#/blank#}a÷0.1[a≠0]