Question

выполните сложение дробей: 28/40+10/75 12/27+14/21 12/24+15/40 12/18+5/60 4/24+3/36

Answer 1

28/40+10/75=7/10+2/15=(21+4)30=25/30=5/6

12/27+14/21=4/9+2/3=(4+6)/9=10/9

12/24+15/40=1/2+3/8=(4+3)/8=7/8

12/18+5/60=2/3+1/12=(8+1)/12=3/4

4/24+3/36=1/6+1/12=(2+1)/12=1/4