Module 4

Aisha used 128 large paper clips and 285 small paper clips for a project. Which is the best estimate of the total number of paper clips she used?

• 100

• 300

• 400

• 200

Maya has 72 stamps in her collection. Jake has 41 stamps. Which is the best estimate for the total number of stamps?

• 110

• 150

• 120

• 130

There are 138 third graders and 157 fourth graders at Linwood Elementary School. How many third and fourth graders are there altogether?

• 295

• 294

• 285

• 281

A farmer sold 48 tomatoes and 24 cucumbers at a market. Round each number to the nearest ten to estimate the sum. About how many tomatoes and cucumbers did the farmer sell in all?

• 80

• 70

• 30

• 60

On a bike trip, Cara biked 21 miles the first day, 34 miles the second day, and 27 miles the third day. How many miles did she bike the three days?

• 82

• 78

• 85

• 80

Taylor scored 334 points in her first word game. She scored 285 in her second game. What is the total number of points Taylor scored?

• 519

• 529

• 619

• 629

There are 38 roses, 35 tulips, and 22 lilies. The Commutative Property of Addition can help you add. Which shows the Commutative Property of Addition?

• 38 + 35 + 22 = (38 + 35) + 22

• 38 + 35 + 22 = 38 + (35 + 22)

• 38 + 35 + 22 = 38 + 22 + 35

• 38 + 35 + 22 = (38 + 35 + 22)

Aliyah spent 47 minutes playing soccer on Saturday. She spent 32 minutes playing soccer on Sunday. Which is the best estimate for the total number of minutes she played soccer on these two days?

• 80 minutes

• 90 minutes

• 70 minutes

• 60 minutes

Sophie’s family packed for a trip. Their suitcases weigh 45, 45, and 53 pounds. What is the total weight of their suitcases?

• 98 pounds

• 140 pounds

• 143 pounds

• 145 pounds

Ethan used 272 short craft sticks and 326 long craft sticks to build a boat. Which shows the best compatible numbers to estimate the total number of sticks?

• 200 + 300

• 275 + 325

• 300 + 400

• 250 + 300