Question

zad1 oblicz a) 4/15-1/6+4/5= b) 20 * (16 3/8-5 3/5)= c) 16 3/4- 5 2/3*1/2 prosze o odpowiedz daje naj ;***

Answer 1

a) 4/15-1/6+4/5=

8/30 - 5/30 + 24/30=

27/30=

9/10

 

b) 20 * (16 3/8-5 3/5)=

20* ( 16 i 15/40  - 5 i 24/ 40 )=

20 * ( 15 i 55/40 -  5 i 24/40) =

20 *  10 i 31/40 =

20 * 431/40 =

431/2=

215 i 1/2

 

c) 16 3/4- 5 2/3*1/2 =

16 i  3/4 - 17/3 * 1/2 =

 

16 i 3/4 - 17/6=

16 i 3/4 - 2 i 5/6 =

16 i  9/12 - 2 i 10/12=

15 i 21/12 - 2 i 10/12=

13 i 11/12

Answer 2

a)4/15-1/6+4/5=8/30-5/30+24/30=27/30

b)20*(16 3/8- 5 3/5)=20*10 31/40=215,5

c)16 3/4- 5 2/3*1/2=16 3/4-2 5/6=16 9/12- 2 10/12=13 11/12