Question

PLISKA POMOCY!!!!! Do zrobienia jest 1,2 i 3 MAM TO NA JUTRO!!!

Answer 1

1. a) 1/2 z 12 = 6
b) 1/4 z 20 = 5  
c) 3/4 z 20 = 15, bo 1/4= 5   5*3=15
d) 1/8 z 240 = 30, bo 240/8=30
e) 3/8 z 240 = 90, bo 1/8 = 30  30*3=90

2. a) 0.1 z 20 = 1/10 z 20 = 2
b)  0.3 z 20= 3/10 z 20 = 6, bo 1/10 = 2  2*3=6
c) 0.7 z 260 = 7/10 z 260 = 182, bo 1/10 = 26  26*7=182
d) 0.9 z 480 = 9/10 z 480 = 432, bo 1/10= 48   48*9=432
e) 0.9 z 3..... nw co dalej :)

3. a) 10% z 200                    
100% = 200
10% = 20  
 
 lub
 
 10% z 200
 10% = 0.1
 0.1*200=20          

b) 30% z 200
100% = 200
10% = 20
30% = 60      

lub

30% z 200
30%=0.3
0.3*200=60

c) 25% z 1476
100% = 1476
10% = 147,6
5% = 73.8
20%= 295.2
25% = (295.2 + 73.8) 369

lub

25%z 1476
25%=0.25
0.25*1476=369

d) 50% z ∈ 4.80
100% = 4.80
50% = 2.40  ( 4.80/2=2.40)

lub

50% z 4.80
50%= 0.5
0.5 * 4.80 = 2.40