Assess Yourself
How well do you understand the ideas in this lesson?
Goal:
Goal:
![](https://s3.amazonaws.com/cms.accelerate-ed.com/image/61a1263c-cdc4-4a85-b1b8-a4ce3db7427c.png)
Show What You Know!
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.
What is the missing number in this fact family?
54 - 12 = 42
54 - ___ = 12
- 16
- 42
- 49
Sorry, that is not right. The missing number is 42.
Great job! The missing number is 42.
Sorry, that is not right. The missing number is 42.
Which subtraction sentences are in the same fact family?
- 17 - 11 = 6 and 16 - 12 = 4
- 87 - 28 = 59 and 87 - 59 = 28
- 99 - 16 = 83 and 22 - 12 = 10
Sorry, these subtraction sentences are not in the same fact family.
That is right! These subtraction sentences are in the same fact
Sorry, these subtraction sentences are not in the same fact family.
What is the missing subtraction sentence?
![fact family triangle: 16 in bottom left, 54 in bottom right, 70 in the top. 70 - 16 = 54 in the middle](https://s3.amazonaws.com/cms.accelerate-ed.com/image/bb2e7795-e090-4177-9793-3982e2e4d76e.png)
- 90 - 80 = 10
- 23 - 14 = 9
- 70 - 54 = 16
Sorry, this is not the missing subtraction sentence.
Sorry, this is not the missing subtraction sentence.
Well done! This is the missing subtraction sentence.
What is the missing number in this fact family?
24 - ___ = 12
24 - 12 = 12
- 12
- 17
- 4
Great job! The missing number is 12.
Sorry, that is not right. The missing number is 12.
Sorry, that is not right. The missing number is 12.
Which subtraction sentences are in the same fact family?
- 39 - 12 = 27 and 11 - 10 = 1
- 19 - 9 = 10 and 62 - 43 = 19
- 65 - 32 = 33 and 65 - 33 = 32
Sorry, these subtraction sentences are not in the same fact family.
Sorry, these subtraction sentences are not in the same fact family.
That is right! These subtraction sentences are in the same fact family.
What is the missing subtraction sentence?
![fact family triangle: 12 in bottom left, 26 in bottom right, 38 in the top. 38 - 26 = 12 in the middle](https://s3.amazonaws.com/cms.accelerate-ed.com/image/86ab0583-8f83-47dd-9264-229dbbb49687.png)
- 65 - 20 = 45
- 38 - 12 = 26
- 53 - 18 = 35
Sorry, this is not the missing subtraction sentence.
Well done! This is the missing subtraction sentence.
Sorry, this is not the missing subtraction sentence.
What is the missing number in this fact family?
53 - 17 = 36
53 - ___ = 17
- 43
- 97
- 36
Sorry, that is not right. The missing number is 36.
Sorry, that is not right. The missing number is 36.
Great job! The missing number is 36.
Which subtraction sentences are in the same fact family?
- 16 - 7 = 9 and 16 - 9 = 7
- 9 - 3 = 6 and 30 - 25 = 5
- 33 - 15 = 18 and 90 - 50 = 40
That is right! These subtraction sentences are in the same fact family.
Sorry, these subtraction sentences are not in the same fact family.
Sorry, these subtraction sentences are not in the same fact family.
What is the missing subtraction sentence?
![fact family triangle: 19 in bottom left, 30 in bottom right, 49 in the top. 49 - 19 = 30 in the middle](https://s3.amazonaws.com/cms.accelerate-ed.com/image/59d33cae-4760-449c-84ae-06ffc1b1c4ff.png)
- 49 - 30 = 19
- 70 - 40 = 30
- 68 - 39 = 29
Well done! This is the missing subtraction sentence.
Sorry, this is not the missing subtraction sentence.
Sorry, this is not the missing subtraction sentence.
What is the missing number in this fact family?
61 - ___ = 45
61 - 45 = 16
- 46
- 16
- 22
Sorry, that is not right. The missing number is 16.
Great job! The missing number is 16.
Sorry, that is not right. The missing number is 16.
Summary
Questions answered correctly:
Questions answered incorrectly: