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b) 5/9 + 1/2 = 10/18 + 9/18 = 19/18 = 1 1/18
c) 21/5 * 10/7 - 1/3 = 6 + 1/3 = 6 1/3
d) 12 1/9 - 5/4 * 8/15 = 12 1/9 - 2/3 = 12 1/9 - 6/9 = 11 10/9 - 6/9 = 11 4/9
e) (13/6 * 4/3) * 3/2 = 26/9 * 3/2 = 13/3 = 4 1/3
f) 2/5 * 5/3 + 14/3 * 9/7 = 2/3 + 6 = 6 2/3
g) (3/12 + 4/12) * (7/14 - 4/14) = 7/12 * 3/14 = 1/8
h) (2 2/6 - 1 1/6) : (1 9/12 + 1 2/12) = 1 1/6 : 2 11/12 = 7/6 * 12/35 = 2/5
Mam nadzieję, że pomogłem i liczę na naj.
/ oznacza kreskę ułamkową