Odpowiedź:
zad 1
a) 0,35 = 35/100 = 7/20
b) 1,72 = 1 72/100 = 1 36/50 = 1 18/25
c) 3,212 = 3 212/1000 = 3 106/500 = 3 53/250
d) 0,0028 = 28/10000 = 14/5000 = 7/2500
zad 2
8/15 = 0,53333..... = 0,5(3)
Odp: C
zad 3
0,35 < 0,(35) < 0,355 < 0,356 < 0,(356)
zad 4
a)
937,446 ≈ 940
b)
937,446 ≈ 937
c)
937,446 ≈ 937,45
zad 5
a)
2,15 + 1 2/7 = 2 15/100 + 1 2/7 = 2 3/20 + 1 2/7 = 2 21/140 + 1 80/140 =
= 3 101/140
b)
4 2/3 - 1,1 + 2 4/5 = 4 2/3 - 1 1/10 + 2 4/5 = 4 20/30 - 1 3/30 + 2 4/5 =
= 3 17/30 + 2 4/5 = 3 17/30 + 2 24/30 = 5 41/30 = 6 11/30