Unit 2 Lesson 2 Expanded Subtraction Worksheet (Page 4 of 5) in pdf

Unit 2 Lesson 2 Expanded Subtraction Worksheet Page 4

Lesson

Analyzing Data Using Subtraction

Problem Solving:

How do we find differences in data?

We used bar graphs to display data. Now we will use subtraction to

analyze data in a bar graph. We use subtraction to find the difference

between two pieces of data. The difference represents an increase or

a decrease.

Look at the bar graph below. The graph displays the CD sales for

the Scatter Plots from January through April.

Hipster Records–The Scatter Plots

CDs Sold January–April

5,000

4,000

3,000

2,000

1,000

January

February

March

April

Month

Suppose the Scatter Plots’ manager wants to know how many more

CDs were sold in April than in January. We subtract the data in the

graph to determine the difference in sales between the months.

When we analyze data

in a graph, it helps us to

The graph shows that 1,000 CDs were sold in January.

compare information

by finding differences.

It also shows that 4,000 CDs were sold in April.

The differences show an

We solve an extended subtraction fact to find the difference:

increase or decrease.

4,000 − 1,000 = 3,000.

The Scatter Plots sold 3,000 more CDs in April than January.

Problem-Solving Activity

Reinforce Understanding

Turn to Interactive Text, page 55.

Use the mBook Study Guide

to review lesson concepts.

Unit 2 • Lesson 2

Unit 2 Lesson 2 Expanded Subtraction Worksheet Page 4