Integer rules and operations

Total Flash Cards » 22
 
1. 

When adding a positive and a positive...

 

Just add the 2 numbers and use the same sign.

 
2. 

+8 + +2 =

 

+10

 
3. 

When adding a positive and a negative...

 

Subtract the 2 numbers and use the sign of the number with the greater absolute value.

 
4. 

+8 + -12 =

 

-4

 
5. 

When subtracting integers...

 

Change the minus sign to addition, and the second integer to its opposite, then follow addition rules. Don't change the first number.

 
6. 

-5 - +16 Changes to what?

 

-5 + -16

 
7. 

-15 - -20 =

 

+5

 
8. 

When multiplying or dividing integers with the same sign the answer is always...

 

positive

 
9. 

When multiplying or dividing integers with different signs the answer is always...

 

negative.

 
10. 

+12 x +3 =

 

+36

 
11. 

-15 x +3 =

 

-45

 
12. 

-20 x -3 =

 

+60

 
13. 

When adding a negative and a negative...

 

Just add the numbers and use the same sign (negative.)

 
14. 

-20 + -3 =

 

-23

 
15. 

-40 / -4 =

 

+10

 
16. 

-35 / +7 =

 

-5

 
17. 

+3x - +2=

(when x = -3)

 

-11

 
18. 

4 - 5a

(when a = -1)

 

+9

 
19. 

x / -10 = 12

 

x = - 120

 
20. 

r + 56 = - 30

 

r = - 86

 
21. 

p - 93 = 12

 

p = 105

 
22. 

6h = -48

 

h = -8