Question

Matematyka . Oblicz poniższe przykłady ;

1 . -5 5/7 : (-5/7) +2 (-1 3/4) =

2 . -5 -(-7) * (-8) =

3 . -15 :(-3) +28 :(-4) =

4 . -7 3/5 : 1,9 -(-4) =

5 . -1,4 * (-100) +10 : (-1/4) =

6 . 0,6 : (- 3/5) -4 *(-1/4) =

7 . -4 2/3 : 4 2/3 - 2 2/3 : 1 1/3 =

8 . 4- (-1 2/3) * (-3/5) =

9 . -2,4 : 3/7 + 2 *(-2,2) =

10 . -2 1/2 : 2+ (-1,2) * (-5) =

Na jutro ;) Z góry dziękuje ; *

Answer 1

1.

-5 5/7 : (-5/7) + 2 (-1 3/4) = -  40/7 * 7/5 + 2/1 * (-7/4) = 8 + (-7/2)= 8 - 3 1/2 = 4 1/2

2.

-5 -(-7)* (-8) = -5 - 56 = - 61

3.

-15 : (-3) + 28 : (-4)= 5 + (-7) = -2

4.

-7 3/5 :1,9 -(-4) = - 38/5 : 19/10 -(-4) = -38/5 * 10/19 -(-4) = - 4 -(-4)  = -4+4=0

5.

-1,4 * (-100) + 10 : (- 1/4) = - 14/10 * (-100/1) + 10 * (-4/1) = 140 - 40 = 100

6.

0,6 : (- 3/5) -4 *(-1/4) = 3/5 * (-5/3) + 1 = -1 + 1 = 0

7.

 -4 2/3 : 4 2/3 - 2 2/3 : 1 1/3 = - 14/3 * 3/14 - 8/3 * 3/4 = -1 - 6/3 = -1 -2 = -3

8.

4- (-1 2/3) * (-3/5) =4- (- 5/3) * (-3/5) = 4 - 1 = 3

9.

-2,4 : 3/7 + 2 *(-2,2) = - 2 2/5 * 7/3 + (-4,4) = 12/5 *7/3 - 4,4 = 84/15 - 4,4 = 5 9/15 - 4 4/10 = 5 18/30 - 4 12/30= 1 6/30 = 1 1/5

10.

-2 1/2 : 2+ (-1,2) * (-5) = - 5/2 * 1/2 + (- 1 1/5) * (- 5/1) = - 5/4 + (- 6/5) * (-5/1) = - 5/4 + 6 = 1 1/4 +6 = 7 1/4

 

. Wydaje mi się, że jest ok . xd