In this video, students will review how to add and subtract without regrouping.
Using base-10 blocks, students will be shown what actually happens when regrouping takes place in addition problems.
Using base-10 blocks, students are shown what is actually taking place when they regroup in a subtraction problem.
In this video, students will practice regrouping more than once in subtraction problems.
Using the "boxing method", students will learn what to do to solve subtraction problems when they are unable to regroup from columns with zeros.
In this video, students will learn to check their addition and subtraction problems by "flipping" the problem and solving the inverse.
In this video, students will learn to use the "cubes" method to solve addition and subtraction word problems.
In this video, students will be introduced to a "real world" example of the usefulness of estimation.
In this video, students will learn how use Front End Estimation to solve problems where an "estimate" is required.