Practice adding two-digit numbers by making tens on Khan Academy. If you are stuck, watch a refresher video or choose to get a hint. Test yourself to see how many you can get correct!

In this exercise, students practice adding two-digit numbers by making tens. Students receive immediate feedback and have the opportunity to get hints and try questions repeatedly.

In this activity, students learn to build and add two digit numbers. They connect number words and numerals.

Students will be challenged in their skills to add 2-digit numbers by making tens

Practice adding two-digit numbers by making groups of ten.

Practice adding 2-digit numbers like 43+27 that have sums that are multiples of 10.

Practice adding two-digit numbers. All numbers in these problems are 100 or less. Students receive immediate feedback and have the opportunity to try questions repeatedly, watch a video or receive hints.

Practice adding two-digit numbers. All numbers in these problems are 100 or less.

Take this practice quiz to see how well you can add four two-digit numbers.

Explains how to add two-digit numbers by focusing on each column of digits as you add, rather than the entire numbers.

This lesson has an explanation for adding two-digit numbers using paper and pencil. There is also a game to practice your skills. The game gives you a percent score of your correct answers, as well as running totals of your correct and...

Add two-digit numbers to help your puppy pals win the race!

Add two-digit numbers to help your puppy pals win the race!

In this lesson on addition within 100, students will learn how to compose numbers and will explore strategies to add double-digit numbers such as vertical addition, regrouping, using multiples of 10, and labeling an open number line.

In this exercise, students practice subtracting two-digit numbers (no regrouping). Students receive immediate feedback and have the opportunity to watch a tutorial video, get hints, and try questions repeatedly.

A step-by-step tutorial showing how to add 2-digit numbers in place value columns without regrouping. Includes exercises to try. CCSS.Math.Content.3.NBT.A.2 Fluently add and subtract within 1000

Practice solving problems like 24 + 45.

Practice solving problems like 45 - 24. Students receive immediate feedback and have the opportunity to try questions repeatedly, watch a video or receive hints.

This site explains how to mentally add two-digit numbers. Gives exercises and games to practice this skill.

Explains how to add two-digit numbers. Gives practice and games to practice this skill.

Students solve two, three, and four-digit addition problems with carrying. The sum turns blue if correct.

An extensive selection of teacher resources to aide in teaching and reviewing addition and subtraction of two and three digit numbers, inverse operations, counting on, and other mental strategies for addition and subtraction. Resources...

Learn how to add double-digit numbers in this lesson complete with examples, rules, and vocabulary.

On this interactive website students practice various math skills using a real life scenario at a hamburger restaurant. Those skills include adding two-digit numbers and three-digit numbers.