Doubles or Near Doubles Facts
What doubles fact can you use to solve 2+3?
2+2 or 3+3
What is a sum?
The answer to an addition problem.
What is a related fact to 6+7=13
7+6=13, 13-6=7, or 13-7=6
What is a difference?
The answer to a subtraction problem.
O O O O O O
O O O O O O
How many rows are in this array?
2 rows
What doubles fact can you use to solve 4+5?
4+4 or 5+5
What is the sum of 8 and 6?
14
What are two related facts to 19-2=17
19-7=12, 17+2=19, or 2+17=19
9-3
6
O O O O
O O O O
O O O O
How many columns are in this array?
4 columns
What doubles fact would be easiest to use when you are trying to add 19+20?
20+20 because it is easier to add groups of tens
16
A related fact is one where every number sentence is composed of the same numbers. (like 1+2=3, 2+1=3, 3-2=1, and 3-1=2)
What is the difference between 11 and 4?
7
O O O O O
O O O O O
O O O O O
What is the number sentence that matches this array?
5+5+5=15
What does the vocabulary term doubles fact mean? (This answer should be words not numbers)
A doubles fact is when both addends are the same.
14+6
20
What are all of the related facts that could help me solve 11+4=__?
11+4=15, 4+11=15, 15-4=11, and 15-11=4
What is the difference between 15 and 9?
6
Mrs. Costa puts some students in 4 rows. There are 4 students in each row. How many students does Mrs. Costa have?
16 students
How do doubles facts help us add quickly in our head? (This answer should be words not numbers)
It is easier to add using a doubles fact and then add one or subtract one in our heads, because I usually can remember doubles facts in my head.
Ms. Morrison has 12 books. She buys 7 more books. How many books does she have now?
19 books
What are all the related facts that could help me solve 18-__=6
18-12=6, 18-6=12, 12+6=18, and 6+12=18
The Bengals scored 17 points. The Bucs scored 14 points. How many more points did the Bengals score than the Bucs?
3 points
Ms, Hayes plants 3 rows of tulips. There are 5 tulips in each row. She also plants 2 rows of sunflowers with 3 sunflowers in each row. How many flowers are there all together?
21 flowers all together