①841﹣3248÷16

②25%×32×1.25

③ × + × ．

0.4×0.8×125×25

6.5×2.3＋6.5×6.7

10×10%＝        56%﹣28%＝       ＝

1﹣0.5%＝        1÷1%＝            1﹣98%＝

3+150%＝        15%÷75%＝        99×0.8+0.8＝

2.5×(7.2×0.4 )={#blank#}1{#/blank#}×({#blank#}2{#/blank#}×{#blank#}3{#/blank#}) 8.8÷1.25÷0.8={#blank#}4{#/blank#}÷({#blank#}5{#/blank#}×{#blank#}6{#/blank#})

5.5×4.6+4.6×4.5=({#blank#}7{#/blank#}+{#blank#}8{#/blank#}) × {#blank#}9{#/blank#} 2.55×0.98={#blank#}10{#/blank#}×{#blank#}11{#/blank#} - {#blank#}12{#/blank#}×{#blank#}13{#/blank#}