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0.2-20%= + = 1+27%= 2÷7+ =
1÷ + ÷1= 2.5×0.2= × = ×2.1=
9× = 4.8× = 1÷ =
5-4÷ = 24÷ = 0.36÷20%=
1÷ × = 170×20%= ×4÷ ×4=
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