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Activity 3 Subtracting Integers
A yellow circle represents 1, and a red triangle represents 1.
Learn how to subtract integers.
Method 1 Use models.
41 12 0
Use four red triangles to Use a yellow circle to represent 1.
represent 4. Two yellow circles cannot be removed
Remove a red triangle. from a yellow circle.
4 1= 3 Add a yellow circle and a red triangle,
which equal 0.
Remove two yellow circles.
1 2= 1
24 000 0
Use two yellow circles to represent 2.
Four red triangles cannot be removed from two yellow circles.
Add 4 pairs of yellow circles and triangles, which equal 0.
Remove 4 red triangles.
2 4=6
1 . Subtract the integers using the method above.
a. 5 2 b. 2 3 c. 3 5
38
A yellow circle represents 1, and a red triangle represents 1.
Learn how to subtract integers.
Method 1 Use models.
41 12 0
Use four red triangles to Use a yellow circle to represent 1.
represent 4. Two yellow circles cannot be removed
Remove a red triangle. from a yellow circle.
4 1= 3 Add a yellow circle and a red triangle,
which equal 0.
Remove two yellow circles.
1 2= 1
24 000 0
Use two yellow circles to represent 2.
Four red triangles cannot be removed from two yellow circles.
Add 4 pairs of yellow circles and triangles, which equal 0.
Remove 4 red triangles.
2 4=6
1 . Subtract the integers using the method above.
a. 5 2 b. 2 3 c. 3 5
38
