1. а)11/48+13/48+17/48; б) 19/55+18/55+12/55;
в) 25/64+17/64+15/64;
г) 23/69+38/69+7/69;
д) 28/43+52/43+19/43;
е) 17/45+11/45+23/45.


2. а) 1/5+3/4+1/5+1/4;
б) 11/12+7/10+3/100+1/12;
в) 12/17+15/24+3/8+5/17;
г) 3/7+5/9+4/9+4/7.

Помогите, плииз.
с объяснением ฅ'ω'ฅ

1/5+3/4+1/5+1/4=(1/5+1/5)+(3/4+1/4)=2/5+1=1целая 2/5

спасибо

11/12+7/10+3/100+1/12=(11/12+1/12)+(7/10+3/100)=1целая73/100

(3/7+4/7)+(5/9+4/9)=1+1=2

(12/17+5/17)+(15/24+9/24)=1+1=2

(25/64+15/64)+17/64= 40/64+17/64=57/64(13/48+17/48)+11/48=30/48+11/48=41/4819/55+(18/55+12/55)=19/55+30/55=49/5523/69+7/69)+38/69=30/69+38/69=68/39(28/43+52/43)+19/43= 80/43+19/43=99/43(17/45+23/45)+11/45=40/45+11/45=51/45