Ch 9 Negative Numbers

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• Middelbare school
• vwo
• Leerjaar 1

Negative numbers

Exercises on adding and subtracting with negative numbers

Copy in your exercise book and fill in the answers

1.  24 + - 12 = 

2. - 6 - - 6 =

3. 4.5 - - 7.5 =

4. 

  

−2​7​​3​​+.......=9​7​​3​​

Answers to the exercises:

1.  24 + - 12 = 12

2.  - 6 - - 6 = 0

3.  4.5  - - 7.5 = 12

4.  - 2  3/7 + 11  = 9  3/7

-8 ... -7

1. <
2. =
3. >

-3,4 ... -3,3

1. <
2. =
3. >

3 x-3 ... -3 x 3

1. <
2. =
3. >

-4 x- 4 ... -2 x 6

1. <
2. =
3. >

3 x -4 =

1. -12
2. 12

-5 x -4 =

1. 20
2. -20

7 x -4 =

1. -28
2. 28

-4 + -4 + -4 =
-4 • 3=

1. -12
2. 12
3. 8
4. 8

-5 + -5 + -5 + -5 =
-5 • 4 =

1. 20
2. -20
3. -10
4. 10

Division (delen)

• You know:  3 • -4 = -12.
• So -12 : -4 = 3 and  -12 : 3 = -4
• The rules for division of negative numbers:
• positief : positief = positief
• positief : negatief = negatief
• negatief : positief = negatief
• negatief : negatief = positief

28 : -4 =

1. -7
2. 7

-18 : -3 =

1. 6
2. -6

-40 : 5 =

1. 8
2. -8

-6 : -3 =

1. -2
2. 2
3. 18
4. -18

Is the answer of the next exercise
+ or -?
5 • 300 • -2 • -24 • 6 • -32=

1. +
2. -

5 x -4 x -1 = ?

1. 1
2. -1
3. -20
4. 20

3 x -4 x 0 x 7 = ?

1. -84
2. 84
3. -19
4. 0

Brackets first!

HAAKJES HEBBEN VOORRANG!! 

() - first calculate the part between the brackets. 

(7 + 3) : (3 + 2) = ?

1. 9
2. 6
3. 2
4. 11

-6 + - 10 = ?

1. -4
2. 4
3. 6
4. -16

(−2)​3​​=

(−1)​4​​=