Adding with Integers
Middle School Math
Created by Crystal Wix, SMS
7.1.1l. Use concrete, pictorial, and symbolic
representations for integers.
7.1.2b. Use models to demonstrate meaning and
effects of arithmetic operations
with integers.
Adding Integers
7 + -11
1. Circle the number that is furthest from zero.
If they are the same distance from zero, circle
the first number.
Adding Integers
7 + -11
1. Circle the number that is furthest from zero.
If they are the same distance from zero, circle
the first number.
Adding Integers
7 + -11
1. Circle the number that is furthest from zero.
If they are the same distance from zero, circle
the first number.
2. If the other number has the same sign, circle
it too; if it has a different sign, put a square
around it
Adding Integers
7 + -11
1. Circle the number that is furthest from zero.
If they are the same distance from zero, circle
the first number.
2. If the other number has the same sign, circle
it too; if it has a different sign, put a square
around it
Adding Integers
7 + -11
1. Circle the number that is furthest from zero. If
they are the same distance from zero, circle the
first number.
2. If the other number has the same sign, circle it
too; if it has a different sign, put a square
around it
3.
means add;
means subtract
Adding Integers
7 + -11
1. Circle the number that is furthest from zero. If
they are the same distance from zero, circle the
first number.
2. If the other number has the same sign, circle it
too; if it has a different sign, put a square
around it
3.
means add;
means subtract
4. The sign of the answer is the sign of the
Adding Integers
7 + -11 = -4
1. Circle the number that is furthest from zero. If
they are the same distance from zero, circle the
first number.
2. If the other number has the same sign, circle it
too; if it has a different sign, put a square
around it
3.
means add;
means subtract
4. The sign of the answer is the sign of the
Now it’s your turn
-8 + -5 = -13
Since there are
, you need to add 8 and 5
which is 13.
The circles were around a negative number, so
the answer is negative.
Now it’s your turn
8 + 5 = 13
Since there are
, you need to add 8 and 5
which is 13.
The circles were around a positive number, so
the answer is positive.
Now it’s your turn
-8 + 5 = -3
Since there are
, you need to subtract
8 and 5 which is 3.
The circle was around a negative number, so
the answer is negative.
Now it’s your turn
8 + -5 = 3
Since there are
, you need to subtract
8 and 5 which is 3.
The circle was around a positive number, so
the answer is positive.
Additional Practice
• http://www.math.com/school/subject1/practi
ce/S1u1L11/S1U1L11Pract.html
• http://www.mathwizz.com/integers/page1.ht
m
• http://mathstar.lacoe.edu/newmedia/integers
/add/activities/activities.html
• http://www.321know.com/g5_65_x2.html
• www.aaamath.com/g76-add-3-negative.html