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Assess Yourself

How well do you understand the ideas in this lesson?

Goal:

Goal:

monkey with checkmark and cross

Show What You Know!

Assess how well you met your goals.

Are you ready to take this lesson's quiz? These questions will help you find out. Go back to the lesson if you don't know an answer.

Which benchmark numbers should we use to round 491 to the nearest 10?

  1. 100, 110, 120, 130, 140, 150, 160, 170, 180, 190, 200
  2. 900, 910, 920, 930, 940, 950, 960, 970, 980, 990, 1,000

Sorry, those are not the correct benchmark numbers.

Sorry, those are not the correct benchmark numbers.

Yes! Those are the correct benchmark numbers.

Which whole ten is closest to 623?

Number line: 600 to 700, with a black dot on 623.

  1. 630
  2. 600

Great work! 623 is close to 620.

Sorry, that was not correct. 623 is close to 620.

Sorry, that was not correct. 623 is close to 620.

Which number line rounds 449 to the nearest 10?

  1. Number line: 400 to 500, with a black dot on 439.
  2. Number line: 400 to 500, with a black dot on 498.

Sorry, that is not the correct number line.

You did it! That is the correct number line.

Sorry, that is not the correct number line.

Round 671 to the nearest 10.

Number line: 600 to 700, with a black dot on 671.

  1. 680
  2. 700

That’s right! 671 rounds down to 670.

Sorry, that was not right. 671 rounds down to 670.

Sorry, that was not right. 671 rounds down to 670.

Which benchmark numbers should we use to round 254 to the nearest 10?

  1. 500, 510, 520, 530, 540, 550, 560, 570, 580, 590, 600
  2. 400, 410, 420, 430, 440, 450, 460, 470, 480, 490, 500

Yes! Those are the correct benchmark numbers.

Sorry, those are not the correct benchmark numbers.

Sorry, those are not the correct benchmark numbers.

Which whole ten is closest to 857?

Number line: 800 to 900, with a black dot on 857.

  1. 850
  2. 900

Sorry, that was not correct. 857 is closest to 860.

Great work! 857 is closest to 860.

Sorry, that was not correct. 857 is closest to 860.

Which number line rounds 812 to the nearest 10?

  1. Number line: 800 to 900, with a black dot on 822.
  2. Number line: 800 to 900, with a black dot on 852.

You did it! That is the correct number line.

Sorry, that is not the correct number line.

Sorry, that is not the correct number line.

Round 245 to the nearest 10.

Number line: 200 to 300, with a black dot on 245.

  1. 300
  2. 240

Sorry, that was not right. 245 rounds up to 250.

That’s right! 245 rounds up to 250.

Sorry, that was not right. 245 rounds up to 250.

Which whole ten is closest to 997?

Number line: 900 to 1,000, with a black dot on 997.

  1. 970
  2. 990

Sorry, that was not correct. 997 is closest to 1,000.

Sorry, that was not correct. 997 is closest to 1,000.

Great work! 997 is closest to 1,000.

Round 209 to the nearest 10.

Number line: 200 to 300, with a black dot on 208.

  1. 300
  2. 200

That’s right! 209 rounds up to 210.

Sorry, that was not right. 209 rounds up to 210.

Sorry, that was not right. 209 rounds up to 210.

Summary

Questions answered correctly:

Questions answered incorrectly: