Doubles & Doubles Plus 1
5 + 5 =
10
Is the number 2 an even or odd number?
Even
8 + 9 = 17
Write a related subtraction fact.
17 - 8 = 9 or 17 - 9 = 8
6 + 5 = 11
What is a tens fact with the same sum?
10 + 1 = 11
How many rows?
OOOO
OOOO
OOOO
3 rows
What doubles fact equals 14?
7 + 7
Is the number 11 an even or odd number?
Odd
12
7 + 5 = 12
What is a tens fact that has the same sum?
10 + 2 = 12
Sally has 2 rows of 5 cookies each. How many cookies does Sally have?
Sally has 10 cookies
What doubles fact can you use to solve 8 + 9?
8 + 8 = 16 + 1 = 17
Is this an even or odd number
OOOO
OOO
How do you know?
Odd, because they are not all in pairs.
18 - 7 = 11
Write a related addition fact
7 + 11 = 18
Find the sum 8 + 5.
Find a tens fact with the same sum.
8 + 5 = 13.
10 + 3 = 13
What is the total?
OOOOO
OOOOO
OOOOO
3 rows
15 total
What doubles fact can you use to solve 4 + 5
4 + 4 = 8 + 1 = 9
Is this an even or odd number
OOOOO
OOOOO
How do you know?
Even, they all have a pair.
7 + 3 + 7
17
7 + 4 = ?
Find a tens fact with the same sum.
7 + 4 = 11
10 + 1 = 11
Johnny has 3 bins of toy cars with 6 toy cars in each bin. How many toy cars does he have?
Johnny has 18 toy cars
What doubles fact can you use to solve 9 + 10
9 + 9 = 18 + 1 = 19
Name all odd numbers
1,3,5,7,9
9 + 9 + 1
19
Find a tens fact with the same sum 8 + 9.
10 + 7 = 17
Andrea sees 14 dogs at the dog park. She sees some small dogs and 9 big dogs. How many small dogs did she see?
Andrea saw 5 small dogs.