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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 do not know an answer.

Which base-ten blocks can help you solve 20 + 20?

  1. 4 rods + 6 rods
  2. 2 rods + 4 rods

Sorry, these base-ten blocks will not help you solve 20 + 20.

Great job! These base-ten blocks can help you solve 20 + 20.

Sorry, these base-ten blocks will not help you solve 20 + 20.

What is 30 + 40?

One hundreds chart: 40 is highlighted, and there are 3 arrows jumping to 50, 60, and 70, and 70 is circled.

  1. 20 + 20 = 40
  2. 10 + 70 = 80

Sorry, that is not correct. 30 + 40 = 70.

That is right! 30 + 40 = 70.

Sorry, that is not correct. 30 + 40 = 70.

Which 1-digit addition sentence will help you solve 40 + 0?

  1. 5 + 2
  2. 2 + 3

You got it! 4 + 0 will help you solve 40 + 0.

Sorry, that is not correct. 4 + 0 will help you solve 40 + 0.

Sorry, that is not correct. 4 + 0 will help you solve 40 + 0.

Which base-ten blocks can help you solve 10 + 20?

  1. 2 rods + 2 rods
  2. 4 rods + 3 rods

Sorry, these base-ten blocks will not help you solve 10 + 20.

Sorry, these base-ten blocks will not help you solve 10 + 20.

Great job! These base-ten blocks can help you solve 10 + 20.

What is 10 + 40?

One hundreds chart: 40 is highlighted, and there is 1 arrow jumping to 50, and 50 is circled.

  1. 50 + 50 = 100
  2. 30 + 50 = 80

That is right! 10 + 40 = 50.

Sorry, that is not correct. 10 + 40 = 50.

Sorry, that is not correct. 10 + 40 = 50.

Which 1-digit addition sentence will help you solve 30 + 20?

  1. 2 + 1
  2. 5 + 4

Sorry, that is not correct. 3 + 2 will help you solve 30 + 20.

You got it! 3 + 2 will help you solve 30 + 20.

Sorry, that is not correct. 3 + 2 will help you solve 30 + 20.

Which base-ten blocks can help you solve 10 + 40?

  1. 3 rods + 2 rods
  2. 3 rods + 1 rod

Sorry, these base-ten blocks will not help you solve 10 + 40.

Sorry, these base-ten blocks will not help you solve 10 + 40.

Great job! These base-ten blocks can help you solve 10 + 40.

What is 90 + 10?

One hundreds chart: 90 is highlighted, and there is 1 arrow jumping to 100, and 100 is circled.

  1. 40 + 50 = 90
  2. 20 + 10 = 30

Sorry, that is not correct. 90 + 10 = 100.

That is right! 90 + 10 = 100.

Sorry, that is not correct. 90 + 10 = 100.

Which 1-digit addition sentence will help you solve 20 + 60?

  1. 2 + 4
  2. 9 + 1

Sorry, that is not correct. 2 + 6 will help you solve 20 + 60.

Sorry, that is not correct. 2 + 6 will help you solve 20 + 60.

You got it! 2 + 6 will help you solve 20 + 60.

Which base-ten blocks can help you solve 70 + 30?

  1. 4 rods + 4 rods
  2. 4 rods + 3 rods

Great job! These base-ten blocks can help you solve 70 + 30.

Sorry, these base-ten blocks will not help you solve 70 + 30.

Sorry, these base-ten blocks will not help you solve 70 + 30.

Summary

Questions answered correctly:

Questions answered incorrectly: