This document provides an overview of teaching addition of integers in the 7th grade mathematics curriculum for the first quarter. It introduces three methods for adding integers: using colored counters, a number line, and rules for same and different signs. Examples are provided for adding integers with these different methods. Students are then given practice problems to solve on their own and check their work against an answer key.

1. Grade 7 – Mathematics
Quarter I
ADDITION OF INTEGERS

2. •add integers using three different
ways: colored counters, number line
or rules.

3. Give the value of the following.
10
14
9
7
31. |3| =
2. |-10| =
3. |-14| =
4. |9|=
5. |-7| =

4. ADDITION OF INTEGERS
1. Colored Counters
-+
3 + 4 =
= zero pair
= 7
3 + (-4) = = -1

5. ADDITION OF INTEGERS
Colored Counters -+
-6 + 4 =
= zero pair
= -2
-2 + (-3) = = -5

6. 2. Number Line
0 1 2 3 4 5 6 7 8-8 -7 -6 -5 -4 -3 -2 -1
- starts with the origin
- 6 + 4 = -2
ADDITION OF INTEGERS

7. 2. Number Line
0 1 2 3 4 5 6 7 8-8 -7 -6 -5 -4 -3 -2 -1
Example:
move 5 units to the left and 6 units to the right
- starts with the origin
- 5 + 6 = 1
ADDITION OF INTEGERS

8. 3. Rule: SAME SIGN, add and keep
DIFFERENT SIGN, subtract.
KEEP the sign of bigger number
And it will be EXACT.
ADDITION OF INTEGERS
(absolute value)
- 6 + 4 =
3 + 4 =
(like sign)
(unlike sign)
vv
7
2- 6 + (-4) =
-3 + (-4) = 7
2
-
vv
(common sign)

9. ADDITION OF INTEGERS
2. -7 + 10 =
1. 3 + (-5) = 2
3
4. 8 + (-4) + 3 =
3. -3 + (-2) = 5
11
-
+ (-4) = 7
-
5. 2 + (-5) + (-3) = 2 + (-8) = -6

10. Test Yourself.
2. -70 + 15 =
1. 3 + (-7) =
4. 4 + (-6) + 8 =
3. -14 + (-20) =-
5. 10 + (-1) + (-4) =

11. Answer Key
1. -4
2. -55
3. -34
4. 6
5. 5