①3.5×216＝{#blank#}1{#/blank#}      ②756÷21.6={#blank#}2{#/blank#}   ③3.5×21.6＝{#blank#}3{#/blank#}

④3.5×21.6＝{#blank#}4{#/blank#}     ⑤75.6÷3.5＝{#blank#}5{#/blank#}    ⑥3.5×0.216＝{#blank#}6{#/blank#}

5.16×0.18{#blank#}1{#/blank#}5.16               5.16÷0.18{#blank#}2{#/blank#}5.16 

8.9×1.02{#blank#}3{#/blank#}8.9-1.02           1.5×0.9{#blank#}4{#/blank#}0.9×1.5

3.783.78÷0.25   2.08÷0.42.08×2.5

3.78÷1.053.78  6.7÷0.86.7×0.8

7.35÷2.1=       1.03×5.9=      27.5÷0.25=