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b)1 2/5+ 3 4/10+ 2 1/2= 1 4/10 + 3 4/10+ 2 5/10=7 3/10
f) 10- (2 1/9 -1/2+1 5/6)= 10-(2 2/18- 9/18 +1 15/18)= 3 11/18
Sory,ale h nie umiem :C