Doubles Facts
I am one more than the sum of the doubles fact for 4. What number am I?
9 (4+4+1)
Andrea has 8 red buttons and 6 blue buttons. How many buttons does Andrea have in all?
14 (8+6)
Mr. Li has 16 pencils. He gives 9 pencils to some students. How many pencils does Mr. Li have now?
7 (16-9=7)
Rita counts 4 frogs in the grass and some other frogs in the water. There are 10 frogs in all. How many frogs are in the water?
6 (__+4=10 so 10-4=6)
The answer to an addition problem.
Sum
I am one less than the sum of the doubles fact for 3. What number am I?
5 (3+3-1)
On Monday, Tony saw 4 cats and 9 dogs. How many animals did Tony see on Monday?
13 (4+9)
There were 12 ducks at the pond. 7 ducks flew away. how many ducks are at the pond now?
5 (12-7=5)
Trevor and Pam have 16 kites. If Trevor has 7 kites, how many kites doe Pam have?
9 (___+7=16 so 16-7=9)
The answer to a subtraction problem.
Difference
I am one less than the sum of the doubles fact for 9. What number am I?
17 (9+9-1)
Chloe draws 8 pictures. Reggie draws 1 more picture than Chloe. How many pictures do they draw?
17 (8+1=9 then 9+8=17)
Cameron has 13 flowers. 3 are red and the rest are yellow. How many flowers are yellow?
10 (13-3=10)
Mr. Sims has a bag of 17 pears. His family ate some pears and now Mr. Sims has 9 pears left. How many pears did his family eat?
8 (17-___=9 so 9+8=17 or 17-9=8)
The numbers a person is using to add.
Addends
I am one more than the sum of the doubles fact for 20. What number am I?
41 (20+20+1)
Joanne made 9 clay bowls last week. She mad the same number of clay bowls this week. How many clay bowls did she make in two weeks?
18 (9+9)
Abby has 16 grapes. Jason has 9 grapes. How many more grapes does Abby have?
7 (16-9=7)
Elin counts 7 geese in the water and some geese on the shore. There are 16 geese in all. How many geese are on the shore?
9 (7+___=16 so 16-7=9)
When using the inverse (opposite) operation, you are using a ___________________.
Related fact
Max is thinking of a doubles fact. It has a sum that is greater than 7+5 but less than the sum of 8+7 What fact is Max thinking of?
7+7=14 (7+5=12 and 8+7=15)
Henry sees 3 rabbits. Callie sees double that number of rabbits. How many rabbits do they see together?
9 (3+3=6 then 6+3=9)
At camp, 5 children are playing games and 4 children are making crafts. If 6 more children arrive at camp and are playing games, how many more children are playing games than making crafts?
7 (5+6=11 then 11-4=7)
There are some children on the bus. 5 children get off the bus and now there are 8 children left on the bus. How many children on the bus originally?
13 (___-5=8 so 8+5=13)
How much a digit in a number is worth.
Value