Пошаговое объяснение: 1)
3 7/25+5 15/100-7 1/5=1 23/100
1. 3 7/25+ 5 15/100= 3+5+7/25+15/100=8+7/25+15/100=8+ 28/100+15/100=
=8+43/100
2. 8+43/100-7 1/5=(8-7)+(43/100-1/5)=1+(43/100-1/5)=1+(43/100-20/100)=1+23/100
2)214/15-1/20+3 20/3+2 3/9=1273/60
1.214/15-1/20=856/60-3/60=853/60
2.853/60+3 20/3=853/60+ 3 400/60=3 1253/60
3.3 1253/60+ 2 3/9=5 1253/60+3/9=11277/540+180/540=11457/540=1273/60