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b) 15/18 - 16/18 = - 1/18
c) 1 3/18 - 14/18 = 21/18 - 14/18 = 7/18
d) 9/15 - 1 10/15 = 9/15 - 25/15 = - 1 1/15
e) 2 9/36 + 1 15/36 = 3 24/36 = 3 1/3
f) 1 3/21 + 2 14/21 = 3 17/21
g) 3 6/15 - 5 10/15 = - 2 4/15
h) 4 5/30 - 2 14/30 = 3 35/30 - 2 14/30 = 1 21/30
Mam nadzieję, że pomogłam :)