Question

Ajutor dau coroana și puncte

Answer 1

Răspuns:

Explicație pas cu pas:

a+b

5/9+4/9=(5+4_/9=9/9=1

13/7+10/14=(26+10)/14=36/14=18/7

18/15+2/5=(18+6)/15=24/15=8/5

2/3+2/9=(6+2)/9=8/9

2/3+2/5=(10+6)/15=16/15

5/6+3/8=(20+9)/24=29/24

a-b

5/9-4/9=(5-4)/9=1/9

13/7-10/14=(26-10)/14=16/14=8/7

18/15-2/5=(18-6)/15=12/15

2/3-2/9=(6-2)/9=4/9

2/3-2/5=(10-6)/15=4/15

5/6-3/8=(20-9)/24=11/24

Answer 2

a + b

5 / 9 + 4 / 9 = 9 / 9 = 1

13 / 7 + 10 / 14 = 26 / 14 + 10 / 14 = 36 / 14 = 18 / 7

18 / 15 + 2 / 5 = 18 / 15 + 6 / 15 = 24 / 15 = 8 / 5

2 / 3 + 2 / 9 = 6 / 9 + 2 / 9 = 8 / 9

2 / 3 + 2 / 5 = 10 / 15 + 6 / 15 = 16 / 15

5 / 6 + 3 / 8 = 20 / 24 + 9 / 24 = 29 / 24

a - b

5 / 9 - 4 / 9 = 1 / 9

13 / 7 - 10 / 14 = 26 / 14 - 10 / 14 = 16 / 14 = 8 / 7

18 / 15 - 2 / 5 = 18 / 15 - 6 / 15 = 12 / 15

2 / 3 - 2 / 9 = 6 / 9 - 2 / 9 = 4 / 9

2 / 3 - 2 / 5 = 10 / 15 - 6 / 15 = 4 / 15

5 / 6 - 3 / 8 = 20 / 24 - 9 / 24 = 11 / 24