Unit 2 Reveal Math Review

Which of the following numbers has been rounded correctly to the nearest ten?

• A. 534 → 530

• B. 472 → 500

• C. 829 → 820

• D. 383 → 390

What is nine thousand, two hundred seventy-three written in standard form and expanded form?

• Standard form: 9273, Expanded form: 9000 + 200 + 70 + 3

• Standard form: 9273, Expanded form: 9000 + 270 + 3

• Standard form: 9273, Expanded form: 900 + 2000 + 70 + 3

• Standard form: 9273, Expanded form: 9000 + 200 + 73

Last week, Khadija made 248 bookmarks to sell at the book fair. This week she made 259. How many bookmarks did Khadija make over the two weeks?

• 507

• 497

• 517

• 505

Fred is solving 178 + 429 using partial sums. To find the partial sum of the tens, which numbers would he add?

• A. 10 + 40

• B. 80 + 30

• C. 80 + 90

• D. 70 + 20

Kaleb is reading a book with 823 pages. He has already read 492 pages. How many pages are left to read?

• A. 431 pages

• B. 415 pages

• C. 331 pages

• D. 315 pages

Jessica wants to estimate the difference between two numbers. - First, she rounded both numbers to the nearest hundred. - Then, she subtracted her two rounded numbers to get 400. Which expression could be the original subtraction problem Jessica started with? Choose all that apply.

• 546 − 174

• 629 − 236

• 845 − 379

• 954 − 206

Use the bar diagram to help you find the unknown number two ways.

• 481 + _______ = 948

• 948 − _______ = 481

• 481 + 100 = 948

• 948 − 500 = 481

• 481 + 467 = 948

Which equations are true? Choose all that apply.

• 211 − 199 = 210 − 200

• 381 − 299 = 380 − 300

• 794 − 283 = 800 − 289

• 822 − 109 = 813 − 100

• 299 − 135 = 300 − 130

How can you decompose to solve 958 − 304? Fill in the blanks.

• 958 − _______ = 658

• 658 − _______ = 654

• 958 − _______ = 654

• 658 − _______ = 658

The school cafeteria gets 533 apples and 269 oranges to serve for lunch. During the week, students eat 291 pieces of fruit with their lunch. How many pieces of fruit are left?

• 555 pieces of fruit

• 511 pieces of fruit

• 242 pieces of fruit

• 264 pieces of fruit