Negatives and Positives

Same Signs

100

6+7

13

200

-10-8

-18

300

29+13

42

400

-11 - 11

-22

500

-65-23

-88

Different Signs

100

5-4

1

200

-8+4

-4

300

14-20

-6

400

-6--16

10

500

-18-(-3)

-15

Solve for x#1

100

x + 4 = 7

x = 3

200

x - 10 = 6

x = 16

300

x - 20 = -22

x = -2

400

x + 6 = -12

x = -18

500

x - 24 = -12

x = 12

Solve for x#2

100

5 = x - 2

 x = 7

200

-10 = x + 3

x = -13

300

15 = x - 20

x = 35

400

22 = x + 18

x = 4

500

-11 = x - 18

x = 7

Random

100

Rule:

Same Signs

->

Add

200

Rule:

Different Signs

->

Subtract

300

-9 + 9

0

400

-10 + 25

15

500

What are the two rules that we use to solve the following equation?

x - 14 = -20

Different Signs -> Subtract

Take the sign of the bigger number