Lesson Worksheet: Doubles Plus One Mathematics • 1st Grade

In this worksheet, we will practice adding two consecutive numbers with sums up to 20 by finding one more than a doubles fact.



to find


Notice that 4 is one more than 3.

So the answer to 3+4 is one more than the answer to 3+3.

If 3+3=6, which of the following is equal to 3+4?

  • A3+4+4
  • B6+4
  • C6+1


Olivia was asked to solve 8+9.

She wrote

Is her solution correct?

  • ANo
  • BYes


Jennifer tried to solve 6+7 by using the doubling numbers facts, but she got the answer wrong.

Her teacher circled the mistake in her answer. Help her by finding 6+7.


Complete the following:

  • A
  • B
  • C
  • D


Complete the following addition sentence:


Find the missing number.


Jacob wants to solve 4+5.

Which double fact can help him find the answer?

  • A
  • B
  • C

What is the result?


Use 5+5=10 to find the total number of players on a football team by solving 5+6.


Consider the following.

Find the missing number.

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