# 5.2: Circles and Arrows 3

Difficulty Level: At Grade Created by: CK-12

Look at the picture below. The arrows point to the sum of each row or column. Can you figure out the value of each letter? In this concept, we will practice solving for unknowns in circles and arrows diagrams.

### Guidance

In order to solve the problem above, use the problem solving steps.

• Start by describing what you see in the diagram.
• Next, figure out what your job is in this problem. In all of these problems your job will be to figure out the value of the two letters in the diagram.
• Then, make a plan for how you will solve. There is usually more than one way to solve the problem. You will want to figure out one letter first and then the next letter.
• Next, solve the problem.
• Finally, check to make sure that the values you found work for all 6 of the arrows.

#### Example A

The arrows point to the sum of each row or column. Figure out the value of each letter.

Solution:

We can use the problem solving steps to help.

#### Example B

The arrows point to the sum of each row or column. Figure out the value of each letter.

Solution:

We can use the problem solving steps to help.

#### Example C

The arrows point to the sum of each row or column. Figure out the value of each letter.

Solution:

We can use the problem solving steps to help.

#### Concept Problem Revisited

The arrows point to the sum of each row or column. Figure out the value of each letter.

We can use problem solving steps to help.

### Vocabulary

In math, an unknown is a letter that stands for a number that we do not yet know the value of. In this concept, when you figured out the value of the letters in the circles and arrows diagrams you were solving for unknowns.

### Guided Practice

The arrows point to the sum of each row or column. Figure out the value of each letter.

1.

2.

3.

1.

2.

3.

### Practice

The arrows point to the sum of each row or column. Figure out the value of each letter.

### Notes/Highlights Having trouble? Report an issue.

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Date Created:
Jan 18, 2013