Question

;] Oblicz: a) sumę liczb 2 3/5 i 7 5/6 ............................................................... b) różnicę liczb 3 1/7 i 3/4............................................................... c) o ile większa jest liczba 5 7/9 od liczby 3 1/3 ....................... Oczywiście daje naj na dziś ;] I jeszcze jedno 16 a) Ile to godzizn ? 2/3 doby ............................ 3/4 doby ............................... 1 1/3 doby.......................... 1/8 doby................................. B) ile to dekagramów ? 3/5 kilograma ........................................ 1/20 kilograma................. 1 1/4 kilograma ............... 2 7/20 kilograma ............................... Możecie zrobić jedno zad ale też dwa ;]

Answer 1

2 i 3/5 + 7 i 5/6 = 2 i 18/30 + 7 i 25/30 = 9 i 43/30 = 10 i 13/30

3 i 1/7 - 3/4 = 3 i 4/28 - 21/28 = 2 i 17/28

5 i 7/9 - 3 i 1/3 = 5 i 7/9 - 3 i 3/9 = 2 i 4/9

 

2/3 doby = 24h * 2/3 = 16h

3/4 doby = 24h * 3/4 = 18h

1 i 1/3 doby (4/3 doby) = 24h * 4/3 = 30h

1/8 doby = 24h * 1/8 = 3h

 

1kg = 100dag

3/5 * 100dag = 60dag

1/20 * 100dag = 5dag

1 i 1/4kg (5/4kg) = 5/4 * 100dag = 125dag

2 i 7/20kg (47/20kg) = 47/20 * 100dag = 235dag

Answer 2

a) 2 3/5 + 7 5/6 = 2 18/30 + 7 25/30 = 9 43/30 = 10 13/30 

b) 3 1/7 - 3/4 = 3 4/28 - 21/28 = 2 32/28 - 21/28 = 2 11/28 

c) 5 7/9 - 3 1/3 = 5 7/9 - 3 3/9 = 2 4/9 

 

a) 2/3 doby to :

24 x 2/3 = 24x2/3 = 48/3 = 16 (godzin)

 

3/4 doby to : 

24 x 3/4 = 24x3/4 = 72/4 = 18(godzin)

 

1 1/3 doby to : 

24 + (24x1/3) = 24 + 24/3 = 24 + 8 = 32 (godziny) 

 

1/8 doby to : 

24 x 1/8 = 24x1/8 = 24/8 = 3 (godziny) 

 

b) 3/5 kg to :

1 kg = 100 dag 

3/5kg = 0,6kg 

0,6 kg = 60 dag 

 

1/20 kg to : 

1 kg = 100 dag 

1/20kg = 0,05kg

0,05kg = 5 dag 

 

1 1/4 kg to : 

1/4 kg = 0,25 kg 

1kg = 100 dag

0,25kg = 25 dag 

1000 dag + 25 dag = 125 dag

 

2 7/20 kg to : 

7/20 kg = 0,35 kg 

0,35 kg = 35 dag 

2kg = 200 dag 

2000dag + 35 dag = 235 dag