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Assess Yourself

How well do you understand the ideas in this lesson?

Goal:

Goal:

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Show What You Know!

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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 base-ten blocks help you solve 37 + 4?

  1. 3 rods and 7 cubes + 9 cubes
  2. 3 rods and 7 cubes + 8 cubes

Sorry, that’s not right. 37 + 4 = 41.

Sorry, that’s not right. 37 + 4 = 41.

Very good! These base-ten blocks show 37 + 4 = 41.

What is the sum of 72 + 9?

In the tens section: 1, and under the number 1 is 7, which totals 8. In the ones section: 2, and under the number 2 is 9, which totals 11. 8 and 11, the totals, are circled in red, and the number 1 is crossed out in 11, with an arrow pointing to the 1 in the tens section, meaning its added there.

  1. 20
  2. 33

Great job! 72 + 9 = 81.

Sorry, that’s not correct. 72 + 9 = 81.

Sorry, that’s not correct. 72 + 9 = 81.

Which place-value chart shows the correct regrouping for 28 + 6 = 34?

  1. Tens and ones place-value-chart. In the tens section there are 3 yellow counters. In the ones section, there are 14 blue counters. 8 blue counters are outlined, with an arrow pointing from the 10 blue counters to ones section, adding it to the ones section. There is a 3 in the tens total, and 14 in the ones section, and the number 1 is crossed out.
  2. Tens and ones place-value-chart. In the tens section there are 3 yellow counters. In the ones section, there are 14 blue counters. 2 blue counters are outlined, with an arrow pointing from the 10 blue counters to ones section, adding it to the ones section. There is a 3 in the tens total, and 14 in the ones section, and the number 1 is crossed out.

That’s right! This is the correct regrouping.

Sorry, that is not correct. This place-value chart does not show the correct regrouping.

Sorry, that is not correct. This place-value chart does not show the correct regrouping.

Which base-ten blocks help you solve 15 + 7?

  1. 1 rod and 7 cubes + 8 cubes
  2. 2 rods and 7 cubes + 8 cubes

Sorry, that’s not right. 15 + 7 = 22.

Very good! These base-ten blocks show 15 + 7 = 22.

Sorry, that’s not right. 15 + 7 = 22.

What is the sum of 43 + 8?

In the tens section: 1, and under the number 1 is 4, which totals 5. In the ones section: 3, and under the number 3 is 8, which totals 11. 5 and 11, the totals, are circled in red, and the number 1 is crossed out in 11, with an arrow pointing to the 1 in the tens section, meaning its added there.

  1. 81
  2. 65

Sorry, that’s not correct. 43 + 8 = 51.

Sorry, that’s not correct. 43 + 8 = 51.

Great job! 43 + 8 = 51.

Which place-value chart shows the correct regrouping?

  1. 36 + 8 = 44

    Tens and ones place-value-chart. In the tens section, there are 4 yellow counters. In the ones section, there are 14 blue counters. 4 blue counters are outlined, with an arrow pointing from the 4 blue counters to ones section, adding it to the ones section. There is a 3 in the tens total, and 14 in the ones section, and the number 2 is crossed out.
  2. 36 + 8 = 44

    Tens and ones place-value-chart. In the tens section, there are 4 yellow counters. In the ones section, there are 14 blue counters. 8 blue counters are outlined, with an arrow pointing from the 8 blue counters to ones section, adding it to the ones section. There is a 3 in the tens total, and 14 in the ones section, and the number 2 is crossed out.

Sorry, that is not correct. This place-value chart does not show the correct regrouping.

That’s right! This is the correct regrouping.

Sorry, that is not correct. This place-value chart does not show the correct regrouping.

Which base-ten blocks help you solve 29 + 3?

  1. 2 rods and 9 cubes + 8 cubes
  2. 4 rods and 9 cubes + 8 cubes

Very good! These base-ten blocks show 29 + 3 = 32.

Sorry, that’s not right. 29 + 3 = 32.

Sorry, that’s not right. 29 + 3 = 32.

What is the sum of 54 + 9?

In the tens section: 1, and under the number 1 is 5, which totals 6. In the ones section: 4, and under the number 4 is 9, which totals 13. 6 and 13, the totals, are circled in red, and the number 1 is crossed out in 13, with an arrow pointing to the 1 in the tens section, meaning its added there.

  1. 83
  2. 99

Sorry, that’s not correct. 54 + 9 = 63.

Sorry, that’s not correct. 54 + 9 = 63.

Great job! 54 + 9 = 63.

Which place-value chart shows the correct regrouping?

  1. Tens and ones place-value-chart. In the tens section, there are 5 yellow counters. In the ones section, there are 11 blue counters. 6 blue counters are outlined, with an arrow pointing from the 6 blue counters to ones section, adding it to the ones section. There is a 5 in the tens total, and 11 in the ones section, and the number 1 is crossed out.
  2. Tens and ones place-value-chart. In the tens section, there are 5 yellow counters. In the ones section, there are 11 blue counters. 8 blue counters are outlined, with an arrow pointing from the 8 blue counters to ones section, adding it to the ones section. There is a 5 in the tens total, and 11 in the ones section, and the number 1 is crossed out.

That’s right! This is the correct regrouping.

Sorry, that is not correct. This place-value chart does not show the correct regrouping.

Sorry, that is not correct. This place-value chart does not show the correct regrouping.

Which base-ten blocks help you solve 15 + 6?

  1. 1 rod and 2 cubes + 1 cube
  2. 2 rods and 9 cubes + 3 cubes

Sorry, that’s not right. 15 + 6 = 21.

Very good! These base-ten blocks show 15 + 6 = 21.

Sorry, that’s not right. 15 + 6 = 21.

Summary

Questions answered correctly:

Questions answered incorrectly: