a) 3 3/4 + 2 1/7 = 3 21/28 + 2 4/28 = 5 25/28 b) 6 3/4 - 4 1/3 = 6 9/12 - 4 4/12 = 2 5/12 c) 5 4/15 - 1 2/5 = 5 4/15 - 1 6/15 = 3 13/15
d) 4 3/8 + 5 5/6 = 4 9/24 + 5 20/24 = 9 29/24 = 10 5/24 e) 8 3/5 - 3 1/4 = 8 12/20 - 3 5/20 = 5 7/20 f) 7 10/21 + 2 9/14 = 7 20/42 + 2 27/42 = 9 47/42 = 10 5/42
g) 4 1/11 + 3 1/33 = 4 3/33 + 3 1/33 = 7 4/33
h) 3 5/9 - 1 1/2 = 3 10/18 - 1 9/18 = 2 1/18
i) 5 6/7 - 3/4 = 5 24/28 - 21/28 = 5 3/28
Jakby co "/" zastępuje kreskę ułamkową
