Question

0,8x1/4+0,9:3/5 (nie wiem jak pisac ulamki tu,napisalam jedna czwarta 1/4)

6 3/4 - 0,25 x 8,8=(jest 6 i trzy czwarte tak ulamek pisze)

4,18 - 1 1/4 + 2 4/5= , 5/16 x(3,7 +2,7= , 6 3/8:0,5 x 3/17=

5 3/5-2/3 x 0,75+0,91= ,(0,2)^+3/5x1,6-0,3x1 1/2=(^znak oznaczaDOpotegi 2)

(0,6+4 3/4)x(6 2/3:1/3)-103,5= , (3 1/2+2.75)x(0,65+1/4)= ,

1 5/13+4 2/3:(0,9+3 3/5-2 1/6= ,3/4+0,5-5/7x0,7+9/13x1 11/15= ,

15 13/17-5x(2,6-3/5)x(1,4-4/5)+2/34= ,(6,15-5 3/4)^+(0,6)^= ,

(2/3x0,125+7/24)+2 5/24= , 0,25:1 1/4x(1 3/8+1 1/3)= ,

(4 7/12-2 5/36):3 2/3+3 2/7x2 1/3=

(0,75)^+(1/8+0,25:1/3)^+1 1/64=

(5 1/2+0,35):(13,65-8 13/20)=

9 3/7:1 4/7x 1.395=

Answer 1

1. 0,8x1/4+0,9:3/5= 8/10 x 1/4 + 9/10 x 5/3 = 2/10 + 3/2 = 2/10 + 15/10 = 17/10=1,7

 

2. 6 3/4 -0,25 x 8,8 = 6,75 - 2,2 = 4,55

 

3. 4,18 - 1 1/4 + 2 4/5 = 4,18 - 1 5/20 + 2 16/20 = 4,18 + 1 11/20 = 4 18/100 + 1 55/100 = 5 73/100

 

4. 5/16 x (3,7 + 2,7) = 5/16 x 6,4 = 5/16 x 6 4/10 = 5/16 x 64/10 = 4/2 = 2

 

5. 6 3/8 : 0,5 x 3/17 = 51/8 x 2 x 3/17 = 51/4 x 3/17 = 153/68 = 2 17/68 =

= 2 1/4

 

6. 5 3/5 - 2/3 x 0,75 + 0,91 = 5 3/5 - 2/3 x 3/4 + 0,91 = 5 3/5 - 1/2 + 91/100 = 5 60/100 - 50/100 + 91/100 = 5 10/100 + 91/100 = 5 101/100 = 6 1/100

 

7.  (0,2)² + 3/5 x 1/6 -0,3 x 1 1/2 = 0,04 + 3/30 - 3/10 x 3/2 = 0,04 + 3/30 - 9/20 = 0,04 + 0,1 - 0,45 = - 0,31

 

8. (0,6 + 4 3/4) x (6 2/3 : 1/3) -103,5 = (3/5 + 4 3/4) x (20/3 x 3/1) - 103,5 = (12/20 + 4 15/20) x 20 -103,5 = 4 27/20 x 20 -103,5 = 107/20 x 20 - 103,5 = 107 - 103,5 = 3,5

 

9. (3 1/2 + 2,75) x (0,65 + 1/4) = (3 1/2 + 2 3/4)x ( 65/100 + 1/4) =

( 3 2/4 + 2 3/4) x (65/100 + 25/100) = 5 5/4 x 90/100 = 25/4 x 90/100 = 45/8 = 5 5/8

 

10. 1 5/13 + 4 2/3 : (0,9 + 3 3/5 - 2 1/6) = 1 5/13 + 14/3 : (9/10 + 3 6/10

- 2 1/6) = 1 5/13 + 14/3 : (4 1/2 - 2 1/6) = 1 5/13 + 14/3 : (4 3/6 - 2 1/6) =

1 5/13 + 14/3 : 2 2/6 = 1 5/13 + 14/3 x 6/14 = 1 5/13 + 2 = 3 5/13

 

11. 3/4 + 0,5 - 5/7 x 0,7 + 9/13 x 1 11/15 = 3/4 + 1/2 - 5/7 x 7/10 + 9/13 x 26/15 = 3/4 + 2/4 - 1/2 + 6/5 = 5/4 - 10/20 + 24/20 = 25/20 + 14/20 = 39/20 = 1 19/20

 

12. 15 13/17 - 5x(2,6 - 3/5)x(1,4 - 4/5)+ 2/34 = 15 13/17 - 5x(2 3/5 - 3/5)x(1 2/5 - 4/5) + 2/34 = 15 13/17 - (5x2) x 3/5 + 2/34 = 15 13/17 - 10x 3/5 + 2/34= 15 26/34 - 6 + 2/34 = 9 26/34 + 2/34 = 9 28/34 = 9 14/17

 

13. (6,15-5 3/4)² + (0,6)² = (6 15/100 - 5 75/100)² + 0,36 = (0,4)² + 0,36 = 0,16 + 0,36 = 0,52

 

14. (2/3 x 0,125 + 7/24) + 2 5/24 = (2/3 x 1/8 + 7/24) + 2 5/24 = (2/24 + 7/24) + 2 5/24 = 9/24 + 2 5/24 = 2 14/24 = 2 7/12

 

15. 0,25 : 1 1/4 x (1 3/8 + 1 1/3) = 25/100 x 4/5 x (1 9/24 + 1 8/24) = 1/5 x 2 17/24 = 1/5 x 65/24 = 13/24

 

16.  (4 7/12 - 2 5/36) : 3 2/3 + 3 2/7 x 2 1/3 = (4 21/36 - 2 5/36) : 3 2/3 + 23/7 x 7/3 = 2 16/36 : 3 2/3 + 23/3 = 88/36 x 3/11 + 23/3 = 8/12 + 23/3 = 8/12 + 92/12 = 100/12 = 8 1/3

 

17. (0,75)² + (1/8 + 0,25 : 1/3)² + 1 1/64 = (0,75)² + (1/8 + 1/4 x 3)² +

1 1/64 = (0,75)² + (1/8 + 3/4)² + 1 1/64 = (3/4)² + (1/8 + 6/8)² + 1 1/64 = 9/16 + (7/8)² + 1 1/64 = 9/16 + 49/64 + 1 1/64 = 36/64 + 49/64 + 1 1/64 =

1 86/64 = 2 22/64 = 2 11/32

 

18. (5 1/2 +0,35) : (13,65 - 8 13/20) = (5 50/100 + 35/100) : (13 65/100 -

8 65/100)= 5 85/100 : 5 = 585/100 x 1/5 = 117/100 = 1,17

 

19. 9 3/7 : 1 4/7 x 1,395 = 66/7 x 7/11 x 1,395 = 6 x 1,395 = 8,37