Odpowiedź:
zad 3
a)
3 4/21 + 32 1/7 = 3 4/21 + 32 3/21 = 35 7/21 = 35 1/3
b)
5 4/11 + 2 3/22 - 1 43/44 = 5 8/22 + 2 3/22 - 1 43/44 = 7 11/22 - 1 43/44 =
= 7 22/44 - 1 43/44 = 6 66/44 - 1 43/44 = 5 23/44
c)
2,45 - 1 21/30 - (- 2 3/25) = 2,45 - 1 7/10 + 2 3/25 = 2,45 - 1,7 + 2 12/100 =
= 0,75 + 2,12 = 2,87
d)
4 1/3 - 2,(3) - 3 2/7 = 4 1/3 - 2 1/3 - 3 2/7 = 2 - 3 2/7 = - 1 2/7
