Question

6 8/10 +21 1/10

2 7/9+ 3 5/6

2 9/10+3 7/15

3/4-2/5

5/8-2/5

3/4-1/6

5 7/9-1 1/2

8 1/6-2 2/5

5 1/4-1 1/6

8 3/4-27/10

Answer 1

27 9/10

2 7/9+ 3 5/6 = 2 14/18 + 3 15/18 = 5 29/18 = 6 11/18

2 9/10 + 3 7/15 = 2 27/30 + 3 14/30 = 6 11/30

3/4 - 2/5 = 15/20 - 8/20 = 7/20

5/8 - 2/5 = 25/40 - 16/40 = 9/40

3/4 - 1/6 = 9/12 - 2/12 = 7/12

5 7/9 - 1 1/2 = 5 14/18 - 1 9/18 = 4 5/18

8 1/6 - 2 2/5 = 8 5/30 - 2 12/30 = 7 35/30 - 2 12/30 = 5 23/30

5 1/4 - 1 1/6 = 5 3/12 - 1 2/12 = 4 1/12

8 3/4 - 27/10 = 8 30/40 - 108/40 = 6 110/40 - 108/40 = 6 2/40 = 6 1/20

 

Rozpisywałem, żeby było łatwiej zrozumieć.