Review Problems TEKS 4.4A, 4.4G, 4.4H and 4.5A

The fourth grade class at Rolling Meadows Elementary School sold 488 candy bars in a candy sale. The fourth grade class at Converse Elementary School sold 319 candy bars. The fourth grade class at John Hopkins Elementary School sold 122 candy bars. Which of the following is the best estimate of the number of candy bars the 3 fourth grade classes sold altogether?

• 700

• 750

• 800

• 900

Answer explanation

To estimate, always round the numbers before doing the operation.

Zaniah scored 358 points more than Layla on a video game. Layla scored 1,274 points. Which is the best estimate of the number of points Zaniah scored?

• 1,610

• 1,620

• 1,630

• 1,640

Answer explanation

On an estimation problem that has answer choices, look at the answer choices to decide what place to round the numbers to before doing the operation.

In June, the Thompson family went on their summer vacation. They spent $345 on the hotel, $156 on travel costs, $415 on meals, $189 on theme park tickets, and $119 on souvenirs. What is a reasonable estimate of their total cost for the vacation?

• Less than $900

• Between $900 and $1,100

• Between $1,100 and $1,300

• More than $1,300

Answer explanation

Round each number in the problem. Find your estimate. Then decide which range your estimate is in to choose your answer.

John had 85 football cards. Carl had twice as many football cards as John. Carl then bought 20 more football cards. Which equation can be used to find f, the number of football cards Carl has now?

• 2 x 85 + 20 = f

• 2 x 85 - 20 = f

• 2 + 85 x 20 = f

• 2 + 85 + 20 = f

Answer explanation

Drawing a strip diagram can help you decide what the equation should look like.

Ms. Jones read a total of 205 pages in three days.

• On the first day, she read 75 pages.

• On the second day and third days, she read the same number of pages.

Which diagram shows a way to find p, the number of pages Ms. Jones read on the third day?

• 
• 
• 
• 

Answer explanation

Draw your own strip diagram for the problem, then find the one that matches yours.

Jason drank 5 glasses of water every day for 6 days. Each glass contained 8 fluid ounces of water.

Which equation represents w, the total amount of water in fluid ounces that Jason drank during these 6 days?

• (5 + 6) + 8 = w

• 12 x 6 = w

• (5 x 6) x 8 = w

• (5 x 8)  $\div$  6 = w 

Answer explanation

Drawing a strip diagram for the problem can help you find the correct equation.

A business earned $105 for one job and $89 for a second job. The money was divided equally among the 4 partners who own the business.

Which strip diagram represents m, the amount of money each partner received?

• 
• 
• 
• 

Answer explanation

Draw your own strip diagram to help you decide which one is correct.

Mrs. Thigpen paid a total of $8.17 to mail three packages.

•She paid $2.77 to mail the first package.

•She paid $3 to mail the second package.

How much did Mrs. Thigpen pay to mail the third package?

• $5.37

• $2.40

• $2.49

• Not here

Answer explanation

Use a strip diagram to help you solve the problem.

The list shows the number of trees Parker planted in three years.

•He planted 521 trees the first year.

•He planted 387 trees the second year.

•He planted 438 trees in the third year.

Parker wants to plant a total of 3,000 trees. How many more trees does Parker need to plant?

• 1,506

• 1,654

• 1,346

• 2,494

Answer explanation

A strip diagram can help you organize what you know.

Jordan drew straight lines on the driveway with chalk. The table shows the lengths of the lines. Which is the difference, in meters, between the lengths of line R and line Q?

• 7.57 m

• 5.95 m

• 2.95 m

• 6.15 m

Answer explanation

Pay attention to which numbers you need from the table. A strip diagram can help.