Two-Digit Addition with Number Bonds
5-4 Adding Tens or Ones to a Two-Digit Number (1.NBT.C.4)
In search of new strategies for teaching two-digit addition in your classroom? Look no further! Two-digit addition can easily be taught with the help of number bonds to decompose two-digit numbers.
Grab our FREE Two-Digit Addition with Number Bonds Anchor Chart to use as inspiration while modeling this strategy for your class. It is best to create anchor charts with students to add to their value and purpose, but it is also always helpful to know ahead of time the type of chart you plan on creating during your lesson.
Activate Their Background Knowledge
Start by reviewing simple number bonds with students. This will help to activate their background knowledge and make number bonds with larger numbers seem less intimidating.
Create Number Bonds
For further engagement, ask students to create their own number bonds using a number of their choice. Discuss how number bonds are a visual representation of addition. When students have reviewed number bonds with smaller numbers to show their understanding of addition, they are ready to move on to two-digit numbers.
Break Down Two-Digit Numbers into Tens and Ones
Using a number bond, show students how to break down a two-digit number into tens and ones. Then, add the ones. Last, add the ones and tens together to find the sum. With practice, your students will be mastering two-digit addition in no time! Complete multiple models for students, and include them in the process as well to help them remember the steps. Be sure to give your students opportunity for independent practice as well.
Download Number Bond Template
If your students need assistance drawing number bonds, consider downloading our FREE Number Bond Template for students to use while adding. Simply, print, cut, and laminate for repeated use!
Free Practice Page
For center work, independent practice, or homework, we have also created a FREE Two-Digit Addition Practice Page for your students to practice adding two-digit numbers independently. This would also make a great exit slip to assess students’ understanding after your lesson.
This Lesson if from our 1st Grade Math Curriculum
Unit 5 – Place Value, Comparison, Sums and Differences to 40
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