Question

1. Porównaj liczby, wstawiając jeden z symboli lub = a) 2/3 7/12 b) 3/5 9/14 c) 7/15 14/29 d) 38/43 19/21 2. Oblicz: -3,625 - 7 ¾ + 3 ½ : ( - 1⅓) =

Answer 1

a) 2/3= 8/12

7/12

8/12 > 7/12

2/3 > 7/12

b) 3/5 = 42/70

9/14= 45/70

45/70 > 42/70

9/14 > 3/5

c) 7/15= 203/435

14/29 = 210/435

210/435 > 203/435

14/29 > 7/15

d) 38/43= 798/903

19/21= 817/903

817/903 > 798/903

19/21 > 38/45

 

2)

-3,625 - 7 ¾ + 3 ½ : ( - 1⅓) = -3 i 625/1000 - (31/4) + (7/2) : (- 4/3)=

= (- 3625/1000) - (31/4) + (7/2) * (-3/4) =

= (- 3625/1000) - (7750/1000) + (-21/8)=

= (- 11375/1000) + (-2625/1000) = -14000/1000= -14

Answer 2

1.

a) 2/3 >  7/12

b)3/5 < 9/14

c)7/15  <14/29

d)38/43  < 19/21

 

Answer 3

Zad.1

a)

2/3 > 7/12

(8/12 > 7/12)

b)

3/5 < 9/14

(42/70 < 45/70)

c)

7/15 < 14/29

(203/435 < 210/435)

d)

38/43 < 19/21

(798/903 < 817/903)

Zad.2

-3,625 -7 3/4 + 3 1/2 : (-1 1/3) =

=-3,625 - 7,75 + 7/2:(-4/3) =

= -11,375 + 7/2 *(-3/4) =

= -11,375 - 21/8 =

= -11,375 - 2,625 =-14