{#blank#}1{#/blank#}+{#blank#}2{#/blank#}+{#blank#}3{#/blank#}+{#blank#}4{#/blank#}

=(8.9+{#blank#}5{#/blank#})+(3.6+{#blank#}6{#/blank#})

={#blank#}7{#/blank#}+{#blank#}8{#/blank#}

={#blank#}9{#/blank#}(元)

0.1﹣0.01＝          2.24+1.76＝            0.1+0.01＝

0.75+0.125＝         11﹣7.9＝              6.57+2.6＝

7.2+1.08＝           10﹣9.8﹣0.2＝         4.5+6.4+5.5+4.6＝

①24.75-4.96-6.75

②[180+19×（106+74）]÷60

③87×47+53×87

④32×25

⑤12.64-（2.75+7.64）

20-5.28-4.72  

5.01-1.9+4.99 

25×37+35×37  

98×12÷21

3.72+17.96+36.28+42.04

37.61-(7.61+1.25)

80.5+80.7+79.8+81.1+80.8+78.8

0.9+9.9+99.9+999.9+9999. 9+0.5

1994+199.4+19.94+1.994

1999+199.9+19.99+1.999+1.111