1st Grade Add Three Numbers worksheets

About this worksheet

Adding three numbers is the first time a child has to hold a running total in mind: add the first two, then add the third. It is also where the strategies pay off, because looking for two numbers that make ten or a double makes the sum much easier. On this grade 1 worksheet each line is an addition sentence with three small numbers, such as 4 + 5 + 6, and your child writes the sum on the line.

Support sheets have totals of 10 or less, standard sheets go up to 15, and challenge sheets go up to 20. Encourage your child to spot a pair that makes ten, for example 4 + 6, and add the last number to it.

What your child will learn

• Add three numbers by adding two first
• Look for two numbers that make 10
• Keep a running total in your head
• Write a sum on a line

Common Core standard: 1.OA.A.2