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Odpowiedź:
zad 5
a) 5/6 +2 1/9 = 15/18 + 2 2/18 = 2 17/18
b) 1 2/5 + 2 3/4 = 1 8/20 + 2 15/20 = 3 23/20 = 4 3/20
c) 2/15 + 3 1/6 = 4/30 + 3 5/30 = 3 9/30 = 3 3/10
d) 5 5/12 + 1 4/9 = 5 15/36 + 1 16/36 = 6 31/36
e) 4 7/8 + 7 5/6 = 4 21/24 + 7 20/24 = 11 41/24 = 12 17/24
f) 13 1/15 + 6 2/25 = 13 5/75 + 6 6/75 = 19 11/75
Odpowiedź:
a) 5/6+ 2 i 1/9= 15/18+ 2 i 2/18= 2 i 17/18
b) 1 i 2/5 + 2 i 3/4= 1 i 8/20+ 2 i 15/20= 3 i 23/20= 4 i 3/20
c) 2/15 + 3 i 1/6= 4/30+ 3 i 5/30= 3 i 9/30= 3 i 3/10
d) 5 i 5/12 + 1 i 4/9= 5 i 15/36 + 1 i 16/36= 6 i 31/36
e) 4 i 7/8 + 7 i 5/6= 4 i 21/24 + 7 i 20/24= 11 i 41/24= 12 i 17/24
f) 13 i 1/15 + 6 i 2/25= 13 i 5/75+ 6 i 6/75= 19 i 11/75
Szczegółowe wyjaśnienie: