Assess Yourself
How well do you understand the concepts and skills introduced in this lesson?
Goal:
Goal:
Show What You Know!
Assess how well you met your goals.
Are you ready to take this lesson's quiz? The questions below will help you find out. Make sure you understand why each correct answer is correct. If you do not, review that part of the lesson.
Kevin had 11 tadpoles, but 3 of them swam away. Use the counting-back strategy to find out how many tadpoles Kevin has left.
- 10
- 4
- 8
Sorry, that was the incorrect answer.
Sorry, that was the incorrect answer.
Yes! That was the correct difference.
If you use the counting-back strategy to solve 7 - 1 = 6, how many fingers should you hold up to count back?
- 7
- 3
- 1
Sorry, that was the incorrect answer.
Sorry, that was the incorrect answer.
Yes! That was the correct number of fingers to count back.
Use the counting-back strategy to solve 10 - 2 = ____.
- 8
- 4
- 7
Yes! That was the correct difference.
Sorry, that was the incorrect answer.
Sorry, that was the incorrect answer.
Tracy had 13 balls. She threw 7 of the balls to her dog. Use the counting-back strategy to find out how many balls Tracy has left.
- 7
- 6
- 10
Sorry, that was the incorrect answer.
Yes! That was the correct difference.
Sorry, that was the incorrect answer.
If you use the counting-back strategy to solve 8 - 4 = 4, how many fingers should you hold up to count back?
- 3
- 4
- 1
Sorry, that was the incorrect answer.
Yes! That was the correct number of fingers to count back.
Sorry, that was the incorrect answer.
Use the counting-back strategy to solve 9 - 3 = ____.
- 6
- 3
- 10
Yes! That was the correct difference.
Sorry, that was the incorrect answer.
Sorry, that was the incorrect answer.
Michael had 7 cat toys. His cat hid 2 of the toys from Michael. Use the counting-back strategy to find out how many cat toys Michael has left.
- 1
- 3
- 5
Sorry, that was the incorrect answer.
Sorry, that was the incorrect answer.
Yes! That was the correct difference.
If you use the counting-back strategy to solve 5 - 1 = 4, how many fingers should you hold up to count back?
- 1
- 6
- 10
Yes! That was the correct number of fingers to count back.
Sorry, that was the incorrect answer.
Sorry, that was the incorrect answer.
Use the counting-back strategy to solve 12 - 6 = ____.
- 2
- 6
- 18
Sorry, that was the incorrect answer.
Yes! That was the correct difference.
Sorry, that was the incorrect answer.
Dave had 7 shoes. His dog chewed 5 of them. How many shoes does Dave have left?
- 5
- 6
- 2
Sorry, that was the incorrect answer.
Sorry, that was the incorrect answer.
Yes! That was the correct difference.
If you use the counting-back strategy to solve 8 - 7 = 1, how many fingers should you hold up to count back?
- 7
- 9
- 2
Yes! That was the correct number of fingers to count back.
Sorry, that was the incorrect answer.
Sorry, that was the incorrect answer.
Use the counting-back strategy to solve 10 - 4 = ____.
- 6
- 8
- 3
Yes! That was the correct difference.
Sorry, that was the incorrect answer.
Sorry, that was the incorrect answer.
Krista had 6 fish in a tank. 6 of the fish hid behind a rock. Use the counting-back strategy to find out how many fish Krista can see.
- 5
- 10
- 0
Sorry, that was the incorrect answer.
Sorry, that was the incorrect answer.
Yes! That was the correct difference.
If you use the counting-back strategy to solve 10 - 6 = 4, how many fingers should you hold up to count back?
- 2
- 6
- 8
Sorry, that was the incorrect answer.
Yes! That was the correct number of fingers to count back.
Sorry, that was the incorrect answer.
Use the counting-back strategy to solve 5 - 2 = ____.
- 7
- 3
- 8
Sorry, that was the incorrect answer.
Yes! That was the correct difference.
Sorry, that was the incorrect answer.
Summary
Questions answered correctly:
Questions answered incorrectly: