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f) 8,35 : 0,1 - 0,1 : 2/5 = 835/100 * 10/1 - 1/10 * 5/2 = 835/10 - 1/2 = 835/10 - 5/10 = 830/10 = 83
g) (2 2/3 - 0,6) * 0,25 - 1/4 = (8/10 - 6/10) * 25/100 - 1/4 = (80/30 - 18/30) * 100/400 - 100/400 = 62/30
h) 3 3/5 - 3/5 + 2 1/3 = 18/5 - 3/5 + 7/3 = 15/5 + 7/3 = 45/15 + 35/15 = 125/15 = 8 1/3
i) 5* = 5 * 20/13 = 100/13 = 7 9/13
myślę że jest dobrze , licze na naj :)