Vocabulary
The symbol in this addition number sentence:
6 + 7
plus sign
3 + 8 =
11
Turn this number sentence around and solve:
5 + 9 =
9 + 5 =14
Using these numbers, what are the number sentences in this fact family:
8, 12, 4
8 + 4 = 12
4 + 8 = 12
12 - 8 =4
12 - 4 = 8
Jim scored 3 goals at his soccer game on Saturday. On Sunday he scored 6 goals. How many goals did he score in all? Write a number sentence and solve.
3 + 6 = 9
9 goals
When you have a number and you add the same number to itself, that is called a ______ fact.
doubles
13 - 6 =
7
8 + ____ = 13
13 - 8 = 5
2, 9, 11
What is the fact family? What are the related facts?
11 is the top, 2 and 9 are the parts
2 + 9 = 11
9 + 2 = 11
11 - 2 = 9
11 - 9 = 2
Bill had 8 toys. His sister broke 2. How many are left? Show your work.
6
The property of addition that says "When you add 0 to any number, the number stays the same."
identity property
7 + 3 =
10
If 6 + 6 = 12
12 - 6 = ____
6
I know 12 - 8 = ___.
So 8 + ___ = 12
4
Amy had 5 dolls. She got 4 more for her birthday. How many does she have in all?
9
The answer to an addition problem is the _____.
The answer to a subtraction problem is the ___________.
sum
difference
5 + 7 + 5 =
Explain how you can use doubles to solve this.
Solve 5 + 5 = 10. Then 10 + 7 = 17. The sum is 17.
14 - 7 =
Solve. Explain how you know using an addition fact.
7 + 7 = 14
14- 7 =7
Solve this: 11 - 5 = ___.
Now, write the "flip flop" fact:
____ - ____ = ____
6
11 - 6 = 5
Kevin has 8 toy cars. Ben has 6 toy cars. Alexa has 3 toy cars. How many do they have all together? Show a number sentence.
8 + 6 + 3 = 17
The two numbers you add together are called parts, or ____________.
addends
6 + 3 + 7 =
What strategy do you use to solve?
7 + 3 = 10
10 + 6 = 16
Write a subtraction fact that matches this addition fact.
3 + 9 = 12
12 - 9 = 3
12 - 3 = 9
Write the fact family triangle for this:
13 - ____ = 7
13 - 7 = ____
7 + ____ = 13
____ + 7 = 13
13
7
6
Sam had 8 lollipops. He got 5 more. Then he gave 4 lollipops away. How many does Sam have now? Show your work.
8 + 5 = 13
13 - 4 = 9
9 lollipops