20.88÷0.8-12.9+1.1脱式计算,能简算的要简算.

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20.88÷0.8-12.9+1.1脱式计算,能简算的要简算.20.88÷0.8-12.9+1.1脱式计算,能简算的要简算.20.88÷0.8-12.9+1.1脱式计算,能简算的要简算.20.88÷0

20.88÷0.8-12.9+1.1脱式计算,能简算的要简算.
20.88÷0.8-12.9+1.1脱式计算,能简算的要简算.

20.88÷0.8-12.9+1.1脱式计算,能简算的要简算.
20.88÷0.8-12.9+1.1
=26.1-12.9+1.1
=26.1-13-1
=12.1