Adding integers with tiles

1
Adding integers with tiles
Two positive integers ( 5) ( 3)
When we combine the tiles there are 8 yellow
tiles. They model 8. So ( 5) ( 3) 8
Adding a negative integer and a positive integer
(- 6) ( 9)
Circle zero pairs
3 yellow tiles model 3 so (- 6) ( 9)
3 Would (9) (-6) be any different?
Adding two negative integers (- 4) (- 2)
We have 6 red tiles so (- 4) (- 2) - 6
2
Copy and complete each magic square
3
Integers on a number line
B
A
The letter A represents 3 The letter B
represents 5 The green circle represents The
red circle represents
- 1
- 4
Your Turn Draw a number line like the one above
and put the letter C at 5, D at 4, E at 2,
and F at 0
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Adding integers using a number line
(- 2) ( 3) Start at (- 2) Draw an arrow to
represent ( 3) Place this arrow so that it
begins at (- 2)
The tip of the arrow is at 1, so (- 2) ( 3)
( 1)
Key Point when adding positive integers we
move more toward the positive end of the line
5
Adding negative integers on the number line
( 3) (- 4) Start at ( 3) Draw an arrow to
represent (- 4) Start the arrow at the 3 The
tip of the arrow is at 1, so ( 3) (- 4) (-
1) Key Point when adding negative integers
we move more toward the negative end of the line
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Your Turn
Draw the number lines and use them to complete
the following (- 4) ( 5), ( 3) (- 3), (-
2) (- 3), ( 1) ( 3)