Subtracting Three Numbers

Math games, especially in the primary grades, provide great opportunities for developing the number sense of young mathematicians. Working in pairs with a deck of single-digit cards, students take turns drawing two cards and reading the...

Third graders read and solve six word problems and decide whether to add or subtract. The numbers range in 2-digit up to 4-digit.

Are you looking for word problems to fit into your Common Core math lesson? Use this resource to assess your third graders' problem-solving skills. They read 14 word problems involving multiplication and division, and write the answers...

Using just the measurements of ten rectangles, scholars match them to their calculated areas. Each of these is measured in feet, so the areas are labeled with square feet. The lengths and widths here are double and triple-digit whole...

Division can be seen in two ways; as splitting a whole into a certain number of pieces, or splitting it into pieces of a certain size. Help your class reach this understanding with these two simple word problems. Encourage the use of...

What a great way to present multiple-digit addition! Sal adds the numbers 2803 and 1443. He draws a chart representing each of the four place values from the problem and then draws "place value buckets” to represent what each number...

The instructor draws a diagram to represent a given value using base 10 blocks. She shows how to divide it up into groups just to give you a visual. She then demonstrates how to solve the problem using the long division method.

Finding patterns is an essential skill for mathematicians of all ages. Follow along with Zoe as she walks step-by-step through the process of identifying and completing number patterns. Work through the Try It! problems as a whole class...

If you need to extend your four-digit addition example problems, this video is perfect. Sal provides a variety of practice problems firmly based on the place value system. Each problem is wonderfully explained using multiple colors and a...

You do not have to be whole to be important. Individuals watch a video on the importance of rational numbers on the number line. Scholars use their knowledge to rename numbers on the number line as well as place rationals on a number...