## Overview

Once you are familiar with Adding Doubles, we can use this strategy to help us understand the concept of Adding Doubles Plus 1.

When you add two of the SAME number, you are adding with DOUBLES FACTS.

1 + 1 and 2 + 2 are both doubles facts.
Look at the example below:

Now, how can we use this knowledge to help us solve certain addition problems? Let’s take a look at a special addition problem below.

3 + 4 =

We are working with 3 + 4, and this is special because we can use the adding double facts and plus 1 to it.

For example, we know that 3 + 3 = 6, so 3 + 4 must have a sum that is one more.

Therefore,

3 + 4 = 7

Doubles facts are easy to remember. Look at the pattern below.

Let’s try a few doubles plus 1 facts! Use the pictures to help you solve.

4 + 5 =

4 + 4 = 8, so 4 + 5 = 9

6 + 7 =

6 + 6 = 12, so 6 + 7 = 13

5 + 6 =

5 + 5 = 10, so 5 + 6 = 11

2 + 3 =

2 + 2 = 4, so 2 + 3 = 5

Remembering the doubles facts can help you with other math problems too!

See Related Worksheets:
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### Practice Question 1

Use the adding doubles plus 1 strategy to solve questions 1 through 5.

7 + 8 =

3 + 4 =

8 + 9 =

5 + 6 =

### Practice Question 5

4 + 5 =

See Related Worksheets:
Doubles-Minus-One with Robot Dog
Worksheets
(0)
Kids will "gear" up for math greatness with this worksheet! There are ten problems on this worksheet...
Robot Basketball Player Scores Twice Minus One
Worksheets
(0)
Somehow this basketball-playing robot always scores one fewer than double points! Students will add ...
Three Fly Guys' Number-Detectives' Agency
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(0)
Have an addition or subtraction problem that's "bugging" you? These three Fly Guy Detectives are who...
Crawling Up the Doubles Tree
Worksheets
(0)
These creepy-crawlies love doubles plus two addition problems! Students will get some great practice...
Relevant Topics: