Double Digit Addition

Double digit addition is the process of adding two numbers together, where each number has two digits. When adding two double-digit numbers, it's important to line up the digits according to their place value (ones, tens).

Example:

Let's add 35 and 48 together:

   35
+ 48
-----
  83

1. Start by adding the ones column: 5 + 8 = 13. Write down the 3 and carry over the 1 to the tens column.

2. Now add the tens column: 1 (from the carry over) + 3 + 4 = 8.

3. So, the sum of 35 and 48 is 83.

Carrying Over:

If the sum of the ones column is greater than 9, you'll need to carry over the extra tens to the next column before adding. This ensures that you're correctly representing the total value of the numbers being added.

Practice adding double-digit numbers to become more comfortable with this concept. Paying attention to place value and carrying over when necessary are key to successfully adding double-digit numbers together.

Happy calculating!

◂Math Worksheets and Study Guides Third Grade. Double Digit Addition

Study Guide

Double Digit Addition

Worksheet/Answer key

Double Digit Addition

Worksheet/Answer key

Double Digit Addition

Worksheet/Answer key

Double Digit Addition

Worksheet/Answer key

Double-Digit Addition

The resources above cover the following skills:

Number and Operations (NCTM)

Compute fluently and make reasonable estimates.

Develop fluency in adding, subtracting, multiplying, and dividing whole numbers.

Select appropriate methods and tools for computing with whole numbers from among mental computation, estimation, calculators, and paper and pencil according to the context and nature of the computation and use the selected method or tools.

Algebra (NCTM)

Use mathematical models to represent and understand quantitative relationships.

Model problem situations with objects and use representations such as graphs, tables, and equations to draw conclusions.

Connections to the Grade 3 Focal Points (NCTM)

Number and Operations: Building on their work in grade 2, students extend their understanding of place value to numbers up to 10,000 in various contexts. Students also apply this understanding to the task of representing numbers in different equivalent forms (e.g., expanded notation). They develop their understanding of numbers by building their facility with mental computation (addition and subtraction in special cases, such as 2,500 + 6,000 and 9,000 - 5,000), by using computational estimation, and by performing paper-and-pencil computations.

Double Digit Addition

Example:

Carrying Over:

[Double Digit Addition] Related Worksheets and Study Guides:

◂Math Worksheets and Study Guides Third Grade. Double Digit Addition

The resources above cover the following skills: