сложите дроби полученную дробь сократите: а)1 /2 +1/ 2 + 1 /2 + 1/ 2 б)1/3+2/3+1/3+5/3 в)7/13+4/13+2/13 г)1/96+5/96+11/96+31/96д)1/42+15/42+17/42+9/42
е)19/78+53/78+37/78+21/78
е)19/78+53/78+37/78+21/78
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1/2+1/2+1/2+1/2=4/2=21/3+2/3+1/3+5/3=9/3=3
7/13+4/13+2/13=13/13=1
1/96++5/96+11/96+31/96=48/96=1/2
1/42+15/42+17/42+9/42=42/42=1
19/78+53/78+37/78+21/78=130/78= 1 целая 52/78