Question

Daje 100pkt i naj zadanie w załączniku

Answer 1

Zad 1
34347 : 1,07 * 1,23 = 32100 * 1,23 = 39483
odp C
zad 2
60/80 * 100 = 6000/80 = 75%
100% - 75% = 25%
odp B
zad 3
8 : 4/100 = 8 * 100/4 = 8 * 25 = 200
odp D
zad 5
P - pole ab = a * b
P₁ - pole cd = 0,9a * 1,2b = 1,08ab
P₁/P * 100% = 1,08ab/ab = 1,08 * 100 = 108%
zad 6
78 * 0,5 = 39
odp D
zad 7
0,12a = 0,15b
a = 0,15b/0,12 * 100% = 125%b
odp B
zad 8
x = 0,7y
y = x : 0,7  = x * 10/7 = 10/7 x
odp C
zad 9
 a = 0,4b
b = a/0,4 = a : 4/10 = a * 10/4 = 2,5a
odp C
zad 1
a - cena towaru
0,8a - po obniżce
1,1 * 0,8a = 0,88a - cena po podwyżce
0,88 * 100% = 88%
100% - 88% = 12%
odp C
zad 1
8 * 0,15 = 1,2
zad 2
12/60 * 100% = 1/5 * 100% = 20%
zad 3
50 * 100/7,5 = 5000/7,5 = 666,(6)
zad 4
600/4 = 150%
150% - 100% = 50%
zad 5
20 * 1,16 = 23,2
zad 6
36 * 0,65 = 19,5
zad 7
6/30 * 100% = 1/5 * 100% = 20%
zad 8
100 * 20/8,5 = 2000/8,5 = 235,29
zad 9
300/2 = 150%
150% - 100% = 50%
zad 10
30 * 1,12 = 33,6
zad 11
28 * 0,45 = 12,6
zad 12
250%
zad 13
400/3,5 = 114,29
zad 14
300 : 4 = 75%
100% - 75% = 25%
zad 15
26 * 0,7 = 18,2