Choose “Save as PDF” in the print dialog to keep a copy.

Cogito

Grade 6 Math · Chapter 5 · Lesson 2

Practice Worksheet

Letters for Numbers

A variable stands for a number you do not know yet.

10 problems · about 17 minutes · 6.EE.A.2

NameDate

Figure — use these to answer the problems

Each bar is an unknown amount. Two of them make twice as much.

One bag and Another bag

7

7

Together

14

Marbles in a bag7

Marbles in a bag7

Figure 1

Warm-Up Review

From earlier lessons. Loosen up before the new work.

2 problems

From “Exponents and Order of Operations”
What is 5 + 2 × 3²?
Answer
From “Distance on the Coordinate Plane”
Distance from (−3, 2) to (5, 2)?
Answer

Warm Up

Straightforward practice. Get the method working first.

4 problems

If a = 8, what is 4a − 5?
Answer
4
What does 2n mean?
- 2 multiplied by n.
- 2 added to n.
If x = 4, what is 5x?
Answer
If x = 5, what is 2x + 7?
Answer

Build It Up

The same ideas with more to keep track of.

2 problems

If y = 3, what is y²?
Answer
If n = 10, what is 3n − 4?
Answer

Stretch Yourself

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

2 problems

Substituting
If n = 6, what is 3n + 2?
Answer
The Perimeter
A square has side s. If s = 9, what is 4s?
Answer