Question

Задание 1. б)1/2+1/5; в) 1/3+1/4; г)1/4+1/5; д)1/2+1/4; е)1/3+1/6; ж)1/2+1/6; з)1/4+1/8 Задание 2 б)1/3+2/3+1/3+5/3; в)3/7+2/7+1/7; г)7/30+7/30+7/30; д)3/10+2/10+1/10; е)7/26+5/26+1/26 Даю 16 балов

Answer 1

1/2+1/5=5/10+2/10=7/10
1/3+1/4=4/12+3/12=7/12
1/4+1/5=5/20+4/20=9/20
1/2+1/4=2/4+1/4=3/4
1/3+1/6=2/6+1/6=3/6=1/2
1/2+1/6=3/6+1/6=4/6=2/3
1/4+1/8=4/8+1/8=5/8
1/3+2/3+1/3+5/3=1+6/3=3
3/7+2/7+1/7=6/7
7/30+7/30+7/30=21/30=7/10
3/10+2/10+1/10=6/10=3/5
7/26+5/26+1/26=13/26=1/2

Answer 2

Задание 1: б) 1/2 + 1/5 = (1*5 + 1*2) / (2*5) = 7/10 в) 1/3 + 1/4 = (1*4 + 1*3) / (3*4) = 7/12 г) 1/4 + 1/5 = (1*5 + 1*4) / (4*5) = 9/20 д) 1/2 + 1/4 = (1*4 + 1*2) / (2*4) = 3/4 е) 1/3 + 1/6 = (1*6 + 1*3) / (3*6) = 1/2 ж) 1/2 + 1/6 = (1*6 + 1*2) / (2*6) = 4/6 = 2/3 з) 1/4 + 1/8 = (1*8 + 1*4) / (4*8) = 3/8

Задание 2: б) 1/3 + 2/3 + 1/3 + 5/3 = (1 + 2 + 1 + 5) / 3 = 9/3 = 3 в) 3/7 + 2/7 + 1/7 = (3 + 2 + 1) / 7 = 6/7 г) 7/30 + 7/30 + 7/30 = (7 + 7 + 7) / 30 = 21/30 = 7/10 д) 3/10 + 2/10 + 1/10 = (3 + 2 + 1) / 10 = 6/10 = 3/5 е) 7/26 + 5/26 + 1/26 = (7 + 5 + 1) / 26 = 13/26 = 1/2

Всего за задания можно получить 16 баллов.