Question

1 . Do sumy liczb 3 4/7 i 5 2/3 dodaj różnicę liczb 6 5/21 i 4 5/42 . 2. Do różnicy liczb 16 5/9 i 4 2/15 dodaj ich sumę . 3. Suma liczb 8 1/2 i 5 2/3 zmniejsz o różnicę liczb 7 3/4 i 2 5/6 . Do sumy liczb 3 5/6 i 7 2/3 dodaj sumę liczb 9 2/9 i 4 1/2 .

Answer 1

1.
a) 3 4/7 + 5 2/3= 3 12/21 + 5 14/21 = 8 36/21 = 9 17/21
b) 6 5/21 - 4 5/42= 6 10/42 - 4 5/42 = 2 5/42
c) 9 17/21 + 2 5/42 = 9 34/42 + 2 5/42= 11 39/42
 2.
a) 16 5/9 - 4 2/15 = 16 25/45 - 4 6/45= 12 19/45
b) 16 5/9 + 4 2/15 = 16 25/45 + 4 6/45= 20 31/45
c) 12 19/45 + 20 31/34 = 32 50/34= 33 16/34
3.
a) 8 1/2 + 5 2/3 = 8 3/6 + 5 4/6 = 13 7/6= 14 1/6
b) 7 3/4 - 2 5/6= 7 9/12 - 2 10/12= 6 21/12 - 2 10/12= 4 11/12
c) 14 1/6 - 4 11/12= 14 2/12 - 4 11/12= 13 14/12 - 4 11/12 = 9 3/12= 9 1/4
4. 
a) 3 5/6 + 7 2/3= 3 5/6 + 7 4/6= 10 9/6= 11 3/6= 11 1/2
b) 9 2/9 + 4 1/2= 9 4/18 + 4 9/18= 13 13/18
c) 11 1/2 + 13 13/18= 11 9/18 + 13 13/18= 24 22/18= 25 4/18