This video teaches students to add two-digit numbers using mental math and left to right addition ( two column addition). The problems appear on a white screen and are explained step-by-step by a math tutor. By the end of the video, students learn t...o add four two-digit numbers. ( 9:39)[more]

In this video, the instructor uses the Paint Program to review how to add numbers. He starts with single-digit numbers, then moves into two-digit numbers, and reviews how to use a number line.

Using tens and ones blocks to model the numbers, students will add a 1-digit number to a 2-digit number. Begin by adding the ones together, then the tens. The user clicks through the slides.

This video demonstrates addition of three-digit numbers mentally with multiples of ten. The problem appears on a white screen, and the strategy is explained step-by-step as the problem is solved. ( 1:30)

In this video a teacher explains several strategies for solving the problem 35 +56. Methods demonstrated include separating the numbers into tens and ones and converting numbers into friendly numbers ( numbers that end in zero). Each problem is wor...ked on a computer screen as the teacher explains step-by-step. ( 3:39)[more]

In this interactive game, students are shown addition/subtraction problems with missing numbers. They are shown three choices of numbers to use to complete each problem. The game contains three levels, with numbers ranging from one to three digits.... ( This link is for an interactive game and may take a few minutes to load.)[more]

This video teaches adding a 2-digit number to a 1-digit number with an introduction to carrying. The narrator of the video walks you through the mathematical computations with the Paint Program.

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