Show:
Write a Number Sentence to Solve a Problem
Counting Back on a Number Line
Using Doubles Facts to Subtract
Finding Differences by Using Addition Facts
100
How can you write a Number Sentence to help you solve this problem? If Sarah has 2 cats and John has 4 cats, how many cats do they have in all?
2 + 4 = 6
100
Show how to Count Back on a Number Line to solve this problem: 10 - 3 =
Begin at 10 and count back three spaces to 7. 10 - 3 = 7
100
What Doubles Facts can help you solve this problem? 4 - 2 =
2 + 2 = 4 So, 4 - 2 = 2
100
What Fact Family can help you solve this problem? 5 - 2 =
2 + 3 = 5 So, 5 - 2 = 3
200
How can you write a Number Sentence to help you solve this problem? If David, Luke and James each have 5 points after a game, how many points do they have in all?
5 + 5 + 5 = 15
200
Show how to Count Back on a Number Line to solve this problem: 12 - 4 =
Begin at 12 and count back four spaces to 8. 12 - 4 = 8
200
What Doubles Facts can help you solve this problem? 6 - 3 =
3 + 3 = 6 So, 6 - 3 = 3
200
What Fact Family can help you solve this problem? 6 - 4 =
4 + 2 = 6 So, 6 - 4 = 2
300
How can you write a Number Sentence to help you solve this problem? Paco has 7 baseball cards. Paul has 5 baseball cards. If Peter brings over 2 of his baseball cards, how many baseball cards will the boys have in all?
7 + 5 + 2 = 14
300
Show how to Count Back on a Number Line to solve this problem: 16 - 5 =
Begin at 16 and counting back five spaces to 11. 16 - 5 = 11
300
What Doubles Facts can help you solve this problem? 8 - 4 =
4 + 4 = 8 So, 8 - 4 = 4
300
What Fact Family can help you solve this problem? 7 - 4 =
4 + 3 = 7 So, 7 - 4 = 3
400
How can you write a Number Sentence to help you solve this problem? Lila scored 2 home runs. Polly scored 4 home runs. Janice scored 6 home runs. What is the total of the two players who scored the least home runs?
2 + 4 = 6
400
Show how to Count Back on a Number Line to solve this problem: 19 - 7 =
Begin at 19 and counting back seven spaces to 12. 19 - 7 = 12
400
What Doubles Facts can help you solve this problem? 12 - 6 =
6 + 6 = 12 So, 12 - 6 = 6
400
What Fact Family can help you solve this problem? 9 - 3 =
3 + 6 = 9 So, 9 - 3 = 6
500
How can you write a Number Sentence to help you solve this problem? Lila scored 2 home runs. Polly scored 4 home runs. Janice scored 6 home runs. What is the total of the two players who scored the most home runs?
4 + 6 = 10
500
Show how to Count Back on a Number Line to solve this problem: 22 - 3 =
Begin at 22 and counting back three spaces to 19. 22 - 3 = 19
500
What Doubles Facts can help you solve this problem? 16 - 8 =
8 + 8 = 16 So, 16 - 8 = 8
500
What Fact Family can help you solve this problem? 12 - 4 =
8 + 4 = 12 So, 12 - 4 = 8