Using Doubles in Math

1
Using Doubles in Math
11
77
44
66
2 2
2
1 1 2

• One dog plus one more dog equals two
• dogs in all.

2
Click to see answer
How many dogs would I have if I added 3 more dogs?
3
1 1 1 1 1 5
5 Dogs in all
Next Problem
4
2 2 4

• Two feet plus two feet equals four feet in all.

4
How many feet would I have if there were 3 more
disks?
Click to see answer
5
2 2 2 2 2 10
10 feet in all
Next Problem
6
3 3 6

• Three wheels plus three wheels equals six wheels
  in all.

6
Click to see answer
How many wheels would I have if I added one more
tricycle?
7
3 3 3 9
9 wheels in all
Next Problem
8
4 4 8

• Four legs plus four legs equal eight legs
  altogether

8
Click to see answer
How many elephant legs would there be if you had
4 elephants?
9
4 4 4 4 16

• 4 elephants with 4 legs each equals 16 legs

16 legs in all
Next problem
10
5 5 10

• Five fingers plus five fingers is ten fingers in
  all

10
How many fingers would there be if you saw 5
hands?
Click to see answer
11
5 5 5 5 5 25

• Count by 5s to find the answer the easy way
  5 10 15 20 25

25 fingers in all
Next Problem
12
6 6 12

• Six cans of pop plus six cans of pop is twelve
  cans of pop in all

12
How many cans of pop would there be if you added
6 more cans?
Click to see answer
13
6 6 6 18
18 cans of pop altogether
Next Problem
14
7 7 14

• Seven aliens plus seven more equals fourteen
  aliens in all

14
Click to see answer
How many aliens would there be if one more showed
up?
15
7 7 1 15
15 aliens in all
Next Problem
16
8 8 16

• 8 pencils and 8 pencils is a total of 16 pencils

16
Click to see answer
How many pencils would I have if I received 2
more?
17
8 8 2 18

• 18 pencils in all

Next Problem
18
9 9 18

• Nine dice plus nine more dice is equal to
  eighteen dice.

18
How many dice would I have if I took 9 dice away?
Click to see answer
19
18 9 9
9 dice left
Next problem
20
10 10 20

• Ten jewels plus ten more jewels equals twenty
  jewels in all.

20
A jewel thief takes two jewels. How many are left
now?
Click to see answer
21
20 - 2 18

• 18 jewels left

Click to review your math facts
22
How fast can you say the answers?

• Doubles
• 2 2 44 88
• 11 99 33
• 55 66 44
• 1010 11 77
• 66 44 22

23
Standards Addressed

• Benchmark 4 - Computation
• The student will(1) 4.4.01 use manipulatives to
  demonstrate joining, separating, and the inverse
  operation of addition and subtraction of sets
  through 18.(1) 4.4.02 ? N demonstrate addition
  and subtraction fact strategies, including the
  following        a.    addition doubles,
  doubles 1, counting on, make a ten, relation
  between addition and subtraction.