Chapter 1 Review: Addition, Subtraction and Rounding

Select the number sentences that show the Commutative Property of Addition. Mark all that apply.

• A) 9 + 7 = 16 + 0

• B) 9 + 7 = 7 + 9

• C) (4 + 5) + 7 = (5 + 4) + 7

• D) 7 + (4 + 5) = (7 + 4) + 5

Select the numbers that round to 500 when rounded to the nearest hundred. Mark all that apply.

• A) 438

• B) 542

• C) 450

• D) 483

• E) 567

There are 165 cars in the parking lot. Complete the chart to show 165 rounded to the nearest 10.

Write each number sentence in the box below the better estimate of the sum. Use the estimates provided in the boxes labeled 300 and 400.

• 300

• 400

Abby and Cruz are playing a game. Abby’s score is 586 points. Cruz’s score is 754. Abby estimates she needs about 200 points more to reach Cruz’s score. How did she estimate? Explain.

The table shows how many shells each person collected. Refer to the table to answer the following statements:

• True

• False

Mikio drove 58 miles on Saturday. On Sunday he drove 23 miles. How many miles did he drive on Saturday and Sunday? Explain how you solved the problem.

Use the table for this question. How many students visited the zoo on Wednesday and Thursday?

Use the table for this question. How many more students visited the zoo on Wednesday than on Monday?

Use the table for this question. How many more students visited the zoo on Monday and Tuesday than on Wednesday?