Lesson: Addition Strategies for Sums up to 20: Doubles Plus One

In this lesson, we will learn how to use known doubles facts to add two consecutive numbers whose sum is within 20.

Sample Question Videos

Q1:

Use

to find

Q2:

Which addition sentence is equal to 7 + 8?

Q3:

Use

to find

Q4:

Notice that 4 is one more than 3.

So the answer to is one more than the answer to .

If , which of the following is equal to ?

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