Double Digit Subtraction

Double digit subtraction is a method of subtracting two numbers, each of which has two digits. When performing double digit subtraction, it's important to align the numbers properly and borrow when necessary.

Example:

Let's subtract 46 from 72.

        7
      - 4
      -----

Start by subtracting the ones place: 2 - 6. Since 2 is smaller than 6, we need to borrow from the tens place. So, we borrow 1 from 7, making it 6 and add 10 to 2, making it 12. Then, we subtract: 12 - 6 = 6.

So, 72 - 46 = 26.

Key Steps:

Align the numbers properly, with the larger number on top.
Start subtracting from the ones place and move to the tens place if necessary.
If the top number is smaller than the bottom number, borrow from the next place value on the left.
Continue subtracting until all place values have been subtracted.

With practice, double digit subtraction can become easier and more intuitive. It's important to understand the concept of place value and borrowing to successfully perform double digit subtraction.

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

Study Guide

Double Digit Subtraction

Worksheet/Answer key

Double Digit Subtraction

Worksheet/Answer key

Double Digit Subtraction

Worksheet/Answer key

Double Digit Subtraction

Worksheet/Answer key

Double-Digit Subtraction

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.