2.3 Collecting like terms

• Math
• Secondary Education

2.3 Collecting like terms

WILF: I can collect like terms.

WALT:  Collect like terms.

Key words:

collecting like terms, like terms, simplify

2.3 Collecting like terms

You can add, subtract or combine like terms.

You cannot combine terms that contain different letters.

2.3 Collecting like terms

You can add, subtract or combine like terms.

You cannot combine terms that contain different letters.

2.3 Collecting like terms

You can add, subtract or combine like terms.

You cannot combine terms that contain different letters.

Which expression is best?

c

c6ab

c

c

✓ is the best way to write simplified expressions.

2a3b

 6ba

6ab

2a + 3b

a + a + 2b + b

3b + a + a

aaa

a × a × a

3ba

ab + ab + ab

2ab + ab

3ab

3a – 4a + a

0

4a – 4a0

2.3 Collecting like terms

Simplify each of these expressions.
1) 8n − n
2) 2g + 8 + 3g – 5
3) 7r + 2s + 3t − 2r + s + 2t

4) 4xy + 3yx

5) 4mn − 3nm + 7gh − 7hg

6) 6a + 7ac − 2a + ca

ADDITION AND SUBTRACTION SQUARESAW

Cut out the nine squares and rearrange them so that the touching sides are equivalent expressions.

The completed puzzle is a 3 by 3 square