Odpowiedź:
zad 1
13 1/7 + x = 40 3/4
x = 40 3/4 - 13 1/7 = 40 21/28 - 13 4/28 = 27 17/28
Odp: C
zad 2
x - 6 5/9 = 20 1/2
x = 20 1/2 + 6 5/9 = 20 9/18 + 6 10/18 = 26 19/18 = 27 1/18
Odp: B
zad 3
3² + (64 - 14 * 4) : 3³ = 9 + (64 - 56) : 8 = 9 + 8/8 = 9 + 1 = 10
10 * 3/5 = 2 * 3 = 6
Odp: C
zad 4
obwód kwadratu = 4 * 2 1/2 cm = 4 * 5/2 cm = 20/2 cm = 10 cm
Odp: D
zad 5
P - pole = 3 3/4 dm * 5 1/3 dm = 15/4 dm * 16/3 dm = 5 dm * 4 dm =
= 20 dm²
Odp: D
