Fact Strategies
What is 5+0?
5
What is 3+3?
6
Emily has 6 pencils. She gets 3 more. How many pencils does she have now?
9 pencils (6+3=9)
Using your number line, start at 5 and count on 3. What number do you get?
8 (5,6,7,8)
00 Points: What is the next number in this pattern: 2,4,6,_? (Think: Adding 2)
8
You know that 6+7=13. Use that fact to quickly solve 13−7=
6
Double the number 6, then add 1. What is your answer? (6+6+1)
13
There were 10 birds in a tree. 4 birds flew away. How many birds are left in the tree?
6 birds (10−4=6)
Using a number line, what is 12−4?
Answer: 7
Fill in the blank: 5+0=5, 5+1=6, 5+2=_
7
If you know 8+2=10, what is 2+8?
10
How would you use "Make a 10" to solve 7+5? Show your steps.
Take 3 from the 5 to make 7+3=10. Add the remaining 2 to 10. So 10+2=12.
Marcus had some cookies. He ate 5 of them. Now he has 7 cookies left. How many cookies did Marcus have to start?
12 cookies (7+5=12)
You have 9 toy cars. How many more do you need to have 16 cars?
7 more cars
What is the pattern in these addition facts: 1+9=10, 2+8=10, 3+7=10?
The sums are all 10. As one addend goes up by 1, the other goes down by 1.
If you know 15−5=10, what is 15−10?
5
To solve 14−8, how can you "Make a 10" to subtract?
Subtract 4 to get to 10 (14−4=10), then subtract the remaining 4 from 8. So, 10−4=6.
Lisa has 8 red balloons and 7 blue balloons. How many balloons does she have in all? Explain how you know.
15 balloons. I know to add because in all means all together, making (8+2=10 and 10+5=15)
4+_=10
6
Describe a pattern you see in doubles facts like 1+1=2,2+2=4,3+3=6.
The sums are always even numbers. The sums increase by 2 each time.
To solve 8+7, what two "Make a 10" steps would you use? Use your counters
Take 2 from the 7 to make 8+2=10. Then add the remaining 5 to 10, so 10+5=15.
Sarah has 9 stickers. Her friend gives her 9 more. How many stickers does Sarah have in all? What strategy will you use? (Counters, number line, make a ten?)
18 stickers (Doubles 9+9=18)
There are 17 students in the class. Some are boys and 9 are girls. How many boys are there? Construct an argument to prove your answer.
8 boys: When I subtract the 9 girls from the total of 17 students, I get 8. This means the other 8 students must be boys.
A baker made 12 cupcakes. He sold 5 of them. Then he made 3 more cupcakes. How many cupcakes does he have now?
10 cupcakes (12−5=7, then 7+3=10)
If you add 0 to any number, what is the pattern for the answer? Give an example.
The answer is always that same number. Example: 10+0=10.