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1/3 + 1/4 + 1/5 + 1/6 = 20/60 + 15/60 + 12/60 + 10/60 = 57/60
1 1/3 = 4/3 = 80/60
2/3 = 40/60
80/60 > 57/60 > 40/60
Zad. 16
b) 7 1/7 · 0,07 - 5 5/8 · 1,6 = 50/7 · 7/100 - 45/8 · 16/10 = 1/2 - 9 = -8 1/2
c) -2,34 · 3 11/13 + 1,26 · 5 5/9 = - 234/100 · 50/13 + 126/100 · 50/9 = - 18/2 + 14/2 = -9 + 7 = -2
Mam nadzieję, że pomogłam ;)