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Warm-up• Get your checklist from the table.

• Get your quiz from my desk.

• Update your checklist using your quiz.

• Staple your quiz to the back of your checklist.

• Get out your homework.

• Get your clicker.

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MathMathAdd IntegersAdd Integers

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What Are You Learning?

•I CAN add integers.

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Why Do You Need To Know This?

•Adding integers is useful because it helps in solving real world problems.

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Vocabulary• What are opposites?

• Two integers that are opposites are also called additive inverses.

• The sum of any number and its additive inverse or opposite is zero.

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Adding Integers Same Sign

The sum of two positive integers is positive.

The sum of two negative integers is negative.

Ex: 12 + 31 =43Ex: -12 + (-31) = -43

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Complete the following problems.

a. -3 + (-2)

b. 26 + 17

c. -14 + (-16)

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10 + 37

47 -27 27 -47

25% 25%25%25%

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20

21 22 23 24 25 26 27 28 29 30 31 32 33

1. 472. -273. 274. -47

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-25 + (-12)

-37 13 -13 37

25% 25%25%25%1. -372. 133. -134. 37

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20

21 22 23 24 25 26 27 28 29 30

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Complete the following problems.

a. 23 + 38

b. -35 + (-49)

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Vocabulary•Zero pair—A positive number that is paired with a negative number.

•When you add them together, they equal zero.

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ExampleUse counters to represent 5 + (-3).□□□□□ + ■■■Group and remove the zero pairs.□□□□□■■■Count the tiles you have left.□□ 5 + (-3) = 2

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ExampleUse tiles to find 2 + (-5)□□ + ■■■■■Group and remove the zero pairs.□□ ■■■■■Count the tiles you have left.

■■■ -32 + (-5) = -3

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Complete the following problems.

a. -3 + 2b. -5 + 1c. -6 + 5d. 8 + (-3)e. 3 + (-6)

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Adding Integers Different Signs

To add integers with different signs, subtract their absolute values and take the sign of the larger number.

Ex: 7 + (-18) = -11

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Integer SongSing to the tune of “Row, Row, Row, Your Boat”

“Same sign, add and keep,Different sign subtract.Take the sign of the higher

number, Then you’ll be exact.”

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Complete the following problems.

a. 7 + (-1)

b. -8 + 4

c. 10 + (-12)

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11 + (-7)

4 -4 -18 18

25% 25%25%25%

1. 42. -43. -184. 18

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20

21 22 23 24 25 26 27 28 29 30

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12 + (-22)

10 -34 -10 34

25% 25%25%25%

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20

21 22 23 24 25 26 27 28 29 30 31 32 33

1. 102. -343. -104. 34

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Complete the following problems.

a. -16 + 9

b. -13 + 8

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10 + (-34) + 17

61 -41 41 -7

25% 25%25%25%

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20

21 22 23 24 25 26 27 28 29 30 31 32 33

1. 612. -413. 414. -7

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Complete the following problems.

a. -1 + 4

b. 7 + (-3)

c. -2 + (-2)

d. (-7) + (-3)

e. 2 + (-6)

f. -4 + 9

g. -5 + (-1)

h. On two plays, a football team loses 8 yards and then gains 3 yards.

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HomeworkWrite the following assignment in

your agenda!!

Sheet E-59