# Spectrum Math Grade 4 Chapter 3 Lesson 10 Answer Key Problem Solving

This handy Spectrum Math Grade 4 Answer Key Chapter 3 Lesson 3.10 Problem Solving provides detailed answers for the workbook questions.

## Spectrum Math Grade 4 Chapter 3 Lesson 3.10 Problem Solving Answers Key

Solve each problem.

Question 1.
Roberto and Steve counted the pennies they have been saving for 5 years. Roberto has 52,781 pennies and Steve has 58,972 pennies. How many pennies do they have altogether?
They have ____ pennies.
Given that,
Roberto has 52,781 pennies.
Steve has 58,972 pennies.
The total number of pennies are 52,781 + 58,972 = 1,11,753.
Therefore there are 1,11,753 pennies altogether.

Question 2.
A baseball team gave away free hats to 10,917 fans. There were 13,786 people at the game. How many fans did not get a free hat?
____ fans did not get a free hat.
Given that,
A baseball team gave away free hats to 10,917 fans.
There were 13,786 people at the game.
The number of fans did not get a free hat = 13,786 – 10,917 = 2,869.
Therefore the fans did not get a free hat is 2,869.

Question 3.
Mr. Chien’s art classes melted down broken crayons to make a wax figure. The morning class melted 7,325 pieces. The afternoon class melted 6,800 pieces. How many pieces did the classes melt?
The classes melted ___ pieces.
Given that,
The morning class melted 7,325 pieces.
The afternoon class melted 6,800 pieces.
The number of pieces melted is 7,325 + 6,800 = 14,125.
Therefore the number of pieces that the classes melted is 14,125.

Question 4.
There are 5,248 different types of insects in Sue’s neighborhood. Of those, 518 can be harmful to people. How many insects cannot hurt Sue?
_____ insects cannot hurt Sue.
Given that,
There are 5,248 different types of insects in Sue’s neighborhood.
518 can be harmful to people.
The number of insects cannot hurt Sue is 5,248 – 518 = 4,730.
Therefore there are 4,730 insects cannot hurt Sue.

Question 5.
Jasmine and her brother counted their button collection. Jasmine counted 5,213 buttons in all. Her brother counted 973 buttons that were blue. How many buttons were not blue?
____ buttons were not blue.
Given that,
Jasmine counted 5,213 buttons.
Her brother counted 973 buttons that were blue.
The number of buttons not blue is 5,213 – 973 = 4,240.
Therefore the number of buttons not blue = 4,240.

Question 6.
The post office delivered 55,002 letters to pen pals in England this year. Last year, the post office delivered 49,000 letters. How many more letters did the post office deliver this year?
The post office delivered ____ more letters this year.