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Cogito

Grade 6 Math · Chapter 5 · Lesson 5

Practice Worksheet

Combining Like Terms

Tidying an expression without changing it.

10 problems · about 18 minutes · 6.EE.A.3, 6.EE.A.4

NameDate

Figure — use these to answer the problems

Rows of the same length combine into one taller block.

3 + 3 + 3 + 3 + 3 + 3 + 3 = 21

7 × 3 = 21

How many n terms7

The value of n3

Figure 1

Warm-Up Review

From earlier lessons. Loosen up before the new work.

3 problems

From “Writing Expressions from Words”
Evaluate 4n − 3 when n is 5.
Answer
From “Equivalent Expressions”
4(n + 3) expands to 4n + what?
Answer
From “Letters for Numbers”
If a = 8, what is 4a − 5?
Answer

Warm Up

Straightforward practice. Get the method working first.

3 problems

Simplify 6n + 3n. How many n?
Answer
Simplify 2n + 6n. How many n?
Answer
Simplify 9n − 4n. How many n?
Answer

Build It Up

The same ideas with more to keep track of.

2 problems

7
Can 3n + 5 be simplified to 8n?
- No. They are not like terms.
- Yes.
Simplify 3n + 2 + 4n. How many n?
Answer

Stretch Yourself

Mixed problems. Work out what kind of question it is before you start.

2 problems

The Check
Simplify 4n + 5n, then evaluate it when n is 3.
Answer
The Same Value
Evaluate 4n + 5n when n is 3, without simplifying first.
Answer