Adding & Subtracting Integers A

Question 0

-7 + 11 =

Answer 0

4

addition rule #2

Question 1

4 + (-7) =

Answer 1

-3

addition rule #2

Question 2

-8 + (-5) =

Answer 2

-13

addition rule #1

Question 3

-9 - 7 =

Answer 3

-16

subtraction rule, addition rule #1

-9 + (-7) = -16

Question 4

7 - 13 =

Answer 4

-6

subtraction rule, addition rule #2

7 + (-13) = -6

Question 5

-12 - (-6) =

Answer 5

-6

subtraction rule, addition rule #2

-12 + 6 = -6

Question 6

9 + (-8) =

Answer 6

1

addition rule #2

Question 7

-14 - (-6) =

Answer 7

-8

subtraction rule, addition rule #2

-14 + 6 = -8

Question 8

-4 + (-9) =

Answer 8

-13

addition rule #1

Question 9

8 - (-9) =

Answer 9

17

subtraction rule, addition rule #1

8 + 9 = 17

Question 10

-10 + 6 =

Answer 10

-4

addition rule #2

Question 11

-5 + (-7) =

Answer 11

-12

addition rule #1

Question 12

6 - 15 =

Answer 12

-9

subtraction rule, addition rule #2

6 + (-15) = -9

Question 13

-2 + 12 =

Answer 13

10

addition rule #2

Question 14

6 + (-5) =

Answer 14

1

addition rule #2

Question 15

-3 - 7 =

Answer 15

-10

subtraction rule, addition rule #1

-3 + (-7) = -10

Question 16

-8 + (-7) =

Answer 16

-15

addition rule #1

Question 17

9 - (-2) =

Answer 17

11

subtraction rule, addition rule #1

9 + 2 = 11

Question 18

8 - 9 =

Answer 18

-1

subtraction rule, addition rule #2

8 + (-9) = -1

Question 19

16 - 7 =

Answer 19

9

subtraction rule, addition rule #2

16 + (-7) = 9

Question 20

-5 - (-8) =

Answer 20

3

subtraction rule, addition rule #2

-5 + 8 = 3

Question 21

-9 + (-8) =

Answer 21

-17

addition rule #1

Question 22

When do you use addition rule #1?

Answer 22

Use addition rule #1 when you are adding numbers with the same sign.

Ex. 5 + 6 = 11 Or -5 + (-6) = -11

Question 23

When do you use addition rule #2?

Answer 23

Use addition rule #2 when you are adding numbers with different signs.

Ex. -3 + 9 = 6 Or 3 + (-9) = -6

Question 24

What do you change when using the subtraction rule?

Answer 24

Change the subtraction problem to addition and change the sign of the second number.

Ex. 1 Change 7 - 15 = to 7 + (-15) = -8

Ex. 2 Change -2 - (-10) = to -2 + 10 = 8

Question 25

When using addition rule #2, what tells you the sign of the answer?

Answer 25

The sign of the answer will be the sign of the “bigger” number (more precisely, the number with the greater absolute value).

Ex. In the problem -8 + 5 = the answer will be negative because -8 has a greater absolute value than 5.

Question 26

What do you get when you add any number to its opposite number?

Answer 26

Zero.

a + (-a) = 0 (where a is any number)