能简算的要简算0.9-(0.15+0.35÷5/7)
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能简算的要简算0.9-(0.15+0.35÷5/7)
能简算的要简算0.9-(0.15+0.35÷5/7)
能简算的要简算0.9-(0.15+0.35÷5/7)
0.9-(0.15+0.35÷5/7)
=9/10-(3/20+7/20÷5/7)
=9/10-(3/20+7/20*7/5)
=9/10-(3/20+49/100)
=9/10-3/20-49/100
=90/100-15/100-98/100
=(90-15-98)/100
=-23/100
0.9-(0.15+7/20÷5/7)=0.9-(0.15+0.49)=0.26
=0.9-(0.15+0.49)
=0.9+0.64
=1.54