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Number and Operations in Base Ten
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Lesson 4
Compare to Solve Problems
Name
Practice
Algebra Write an equation to find the unknown number. Use a symbol for the unknown.
1. Julie earned $25. This is 5 times as much as what Lisa earned. How much did Lisa earn?
2. The red team scored 4 goals. The blue team scored 3 times as many goals. How many goals did the blue team score?
Homework Helper
Additive comparisons use addition or subtraction to compare.
Multiplicative comparisons use multiplication or division to compare.
Maya went swimming 7 times this month. Her brother went swimming 14 times this month. How many times more did Maya’s brother go swimming than Maya?
Write an equation. Let b represent the unknown.
7 × b = 14
7 × 2 = 14
So, b = 2.
Maya’s brother went swimming 2 times as much as Maya.
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Additive Comparison
how much more
how many more
how much less
Multiplicative Comparison
how many times more
how many times greater
Lesson 4 My Homework�157
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Problem Solving
Write an equation to find the unknown number. Use a variable for the unknown.
3. A large aquarium has 6 more fish than a small aquarium. There are 19 fish in a large aquarium. How many fish are in a small aquarium?
4. 1 Plan Your Solution The table shows the number of roller coasters each student rode at the amusement park.
Riding Roller Coasters
Student Number of Roller Coasters
Sarah 18
Tom 15
Val 3
Warren 9
How many more roller coasters has Tom been on than Val?
Who rode a roller coaster twice as many times as Warren?
Test Practice 5. Which shows 7 times as many as 5?
A 2
B 5
C 12
D 35
158�Need more practice? Download Extra Practice at connectED.mcgraw-hill.com
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