## Envision Math 4th Grade Textbook Answer Key Topic 2.5 Problem Solving

Missing or Extra Information

Kendra had $7. She bought a sandwich, a drink, and an apple at the cafeteria. She spent a total of$3 on the sandwich and the drink.
How much money did Kendra have left?

Do You Know How?

Question 1.
At the zoo, Julie saw 18 penguins. She saw 8 Adelie penguins. The rest of the penguins she saw were Rockhopper penguins. She learned
that Rockhopper penguins grow to be about 5 to 8 pounds. How many Rockhopper penguins did Julie see?

Question 2.
What information was not needed in Problem 1?

Question 3.
Write a Problem Write a problem that contains too much or too little information.

Independent Practice

Question 4.
Carmin spent 30 minutes completing his homework after school. Then he played soccer. What information do you need to find how many minutes Carmin spent completing his homework and playing soccer all together?

Question 5.
June only has quarters and pennies in her coin collection. She has 85 coins in all. What would you need to know to find out how many quarters June has in her collection?

What do I know?
Kendra had $7. She bought a sandwich, a drink, and an apple. The sandwich and the drink was$3.

What am I asked to find?
The amount of money Kendra had left.

Plan

Draw a diagram to show what you know and want to find.

Think Is there missing information needed to solve the problem?
Is there any extra information not needed to solve the problem?

Question 6.
Kayla ate two tacos and an apple for lunch. The tacos had 260 calories. How many calories did Kayla eat for lunch?

Question 7.
There are 35 sopranos in the school choir. The 40 remaining choir members are altos. How many students are in the school choir?

Question 8.
There are 328 places for activity photographs in the yearbook. The yearbook club has decided to make most of the photographs black and
white. How many color photographs will be in the yearbook?

Question 9.
A notebook costs $2.68, and a pen costs$1.79. Does Jasmine have enough money to buy a notebook and two pens?
Mrs. Song bought school supplies for her two children, Jason and Kevin. Jason is two years older than Kevin and is in the fourth grade. She spent $38 for Kevin’s supplies and$46 for Jason’s supplies. If she paid with a \$100 bill, how much change did she get back?