Odpowiedź:
zad 5
a)
2 3/5 + 1 1/4 + 3 2/5 = 5 5/5 + 1 1/4 = 6 + 1 1/4 = 7 1/4
b)
5 1/3 + 3 1/5 + 1 2/3 = 6 3/3 + 3 1/5 = 7 + 3 1/5 = 10 1/5
c)
8 7/12 + 3 13/15 + 3 2/12 + 2 3/12 = 8 12/12 + 3 13/15 = 9 + 3 13/15 = 12 13/15
d)
3 2/7 + 4 5/9 + 2 6/7 + 1 2/9 + 2 2/9 = 3 2/7 + 2 6/7 + 7 9/9 =
= 5 8/7 + 8 = 6 1/7 + 8 = 14 1/7
zad 6
3 1/3 : 1 * 3/10 = 10/3 * 3/10 = 1
4 7/9 : 5 3/7 * 0 = 43/9 : 38/7 * 0 = 43/9 * 7/38 * 0 = 301/342 * 0 = 0
1 : 5/8 * 5/8 = 1 * 8/5 * 5/8 = 1 * 1 * 1 = 1
Szczegółowe wyjaśnienie:
