Doubles Facts
Using a doubles fact solve the problem:
4 + 5 =
4+4=8 add one equals 9
Use a model:
Trevor has 7 kites. Pam has 4 kites. How many more kites does Trevor have than Pam?
3 more kites
2 + 3 + 2 =
7
What is it called when you are subtracting two numbers?
Finding a Difference
Mark counts 6 ducks in a pond and some ducks on the grass. There are 14 ducks in all. Draw a picture to show the two groups of ducks
6 groups of 8
If you know 6 + 6, you can find 6 + 7.
6+6=12 so add one to answer
Elin counts 7 geese in the water and some geese on the shore. There are 16 geese in all. Draw a picture to show the two groups of geese.
9 group and a 7 group
Show by making a ten.
There are 5 green grapes and 4 red grapes in a bowl. Eli puts 4 more grapes in the bowl. How many grapes are in the bowl now?
13 grapes
You must show a model.
6 − 4 =
2
There are 8 peaches in a basket. Mrs. Dalton puts 7 more peaches in the basket. Complete the addition sentence to find how many peaches are in the basket now
8+7=15
Henry sees 3 rabbits. Callie sees double that number of rabbits. How many more rabbits does Callie see than Henry?
3 rabbits
Write a related addition fact for 15 − 6 = 9.
9+6=15
Nick, Alex, and Sophia eat 15 raisins in all. Nick and Alex each eat 4 raisins. How many raisins does Sophia eat?
7 raisins
Hank has 13 grapes. He gives 5 grapes to his sister. How many grapes does Hank have now? Write a number sentence for the problem. Use ■ for the missing number. Then solve.
8 grapes
= 9 − 4
5
Mr. Norris wrote a doubles fact. It has a sum greater than 6. The numbers that he added are each less than 6. What fact might he have written?
4+4 or 5+5
Write the number sentences and show a model
There are 13 children on the bus. Then 5 children get off the bus. How many children are on the bus now?
6 children are left
Mrs. Moore bought 4 small apples, 6 medium apples, and 3 large apples. How many apples did she buy?
13 apples
How many addition facts relate to the subtraction fact 15 − 9 = 6? Write them.
Two 9+6 or 6+9
Write the doubles facts you could use to find the sum of 3 + 2?
2+2 and 3+3
I am one more than the sum of the doubles fact for 2. What number am I?
The answer is 5
Write a related subtraction fact for 9 + 3 = 12. Explain how the two facts are related.
12-3=9 because I took the sum of 12 and subtracted by 3 to show how 9 is the difference of those numbers.
Write or draw to explain two ways you can find the sum of 3 + 4 + 5
12 Check responses and explanations
Lily sees 15 tan puppies and 8 white puppies at the pet store. How many more tan puppies than white puppies does she see? Draw a picture and write a number sentence to solve.
7 more tan puppies
Beth has a box of 16 crayons. She gives 3 crayons to Jake and 7 crayons to Wendy. How many crayons does Beth have now?
6 crayons