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Lesson: Doubles Plus One Mathematics • 1st Grade

In this lesson, we will learn how to add two consecutive numbers with sums up to 20 by finding one more than a doubles fact.

Lesson Plan

Students will be able to

recognize situations in which doubles plus one is a reasonable strategy for solving addition problems,
use models to solve addition problems by using the doubles-plus-one strategy,
solve addition problems by using the doubles-plus-one strategy without using models.

Q1:

Use

Q2:

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 ?

Q3:

Olivia was asked to solve .

She wrote

Is her solution correct?

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