7.3B Operations with Rational Numbers

​Today's Math Task

​Learning Objective (7.3B)

The student will apply and extend previous understandings of operations to solve problems using addition, subtraction, multiplication, and division of rational numbers.

​by Rebecca Montes

PROBLEM SOLVING MODEL

Read the problem 3 times.

Create a plan to solve the problem.

Solve the problem.

Justify your reasoning.

Multiple Choice

The table shows the prices of some breakfast items at a restaurant. Leia ordered 2 eggs, a slice of bacon, and a glass of orange juice for breakfast. The sales tax for the order was $0.48. She paid for her breakfast with a $10 bill.

How much change should Leia receive from the $10 bill?

• $3.56

• $6.44

• $5.25

• $4.75

Multiple Choice

Iza paid for 5 pallets of grass to be delivered.

Each pallet of grass cost $129.95

Iza paid $76.20 for delivery.

What is the total amount Iza paid?

• $649.75

• $1,030.75

• $725.95

• $581.95

​MATH MEME TIME

Multiple Choice

This week Damian will practice with his band for 1 1/2 hours on Monday, 1 3/4 on Tuesday, and 2 hours on Wednesday. Next week Damian will practice with his band for the same number of hours on Monday, Tuesday, and Wednesday.

What is the total number of hours Damian will practice with his band over these 6 days?

• 5 1/14 hours

• 10 1/2 hours

• 4 1/4 hours

• 8 1/2 hours

Multiple Choice

A fabric store has two rolls of the same cloth. One roll has 10 7/8 yards of cloth, and the other roll has 12 1/4 yards of cloth. The store sells 4 pieces of the cloth. Each piece sold is 4 3/8 yards long.

How many yards of cloth does the fabric store have left?

• 5 1/2 yd

• 6 1/4 yd

• 5 5/8 yd

• 6 3/4 yd

​MATH MEME TIME

Multiple Choice

Mariam needs 10 1/2 yards of fabric to make a quilt. She has one piece of fabric that is 2 1/2 yards and another piece of fabric that is 4 1/4 yards.

How many more yards of fabric does Mariam need to make the quilt?

• 4 1/4 yd

• 3 1/4 yd

• 3 3/4 yd

• 6 3/4 yd

Video Response

What are the 4 steps of the problem solving model?

How do you solve a problem?

When you are ready, record your thoughts.

Open Video Recorder