Odpowiedź:
11.
a) 3 3/8 - 5/8 = 2 11/8 - 5/8 = 2 6/8 = 2 3/4
b) 2 3/7 - 4/7 = 1 10/7 - 4/7 = 1 6/7
c) 8 2/5 - 4/5 = 7 7/5 - 4/5 = 7 3/5
d) 6 5/9 - 8/9 = 5 14/9 - 8/9 = 5 6/9 = 5 2/3
12.
a) 3 i 1/4 - 3/4 = 2 5/4=3/4 = 2 2/4 = 2 1/2
b) 5 i 1/3 - 2/3 = 4 4/3 - 2/3 = 4 2/3
c) 7 2/5 - 4/5 = 6 7/5 - 4/5 = 6 3/5
d) 5 1/4 - 2 3/4 = 4 5/4 - 2 3/4 = 2 2/4 = 2 i 1/2
e) 7 1/5 - 3 3/5 = 6 6/5 - 3 3/5 = 3 3/5
f) 9 1/8 - 2 7/8 = 8 9/8 - 2 7/8 = 6 2/8 = 6 1/4
13. NIE WIEM :((
14.
a) 3 1/7 + 5 4/7 - 1 6/7 = 8 5/7 - 1 6/7 = 7 12/7 - 1 6/7 = 6 6/7
b) 4 - (5 1/3-2 2/3) = 4- (4 4/3- 2 2/3) = 4 - 2 2/3= 1 1/3
Szczegółowe wyjaśnienie:
Mam nadzieje że chociaż trochę pomogłem :DDD
