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b) 1 2/5+ 2 4/5 = 3 6/5= 4 1/5
c) 2-3/4= 1 1/4
d) 3 5/6- 1= 4 5/6
e) 3 2/9 - 1 5/9= 2 12/9 - 1 5/9 = 1 7/9
f) 4 - 1 3/7= 3 4/7
Proszę :*