能简算的要简算:[2.74-0.56×(2又5/12-1又19/60+2.275)]÷17/20

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能简算的要简算:[2.74-0.56×(2又5/12-1又19/60+2.275)]÷17/20
能简算的要简算:[2.74-0.56×(2又5/12-1又19/60+2.275)]÷17/20

能简算的要简算:[2.74-0.56×(2又5/12-1又19/60+2.275)]÷17/20
【2.74-0.56×(29/12-79/60+91/40)】÷17/20
=【2.74-14/25×27/8】÷17/20
=【2.74-1.89】÷17/20
=0.85÷17/20
=0.85÷0.85
=1