Students calculate elapsed time in a series of activities. In this calculating time lesson, students view a Cyberchase video that demonstrates how to calculate elapsed time. Activities include counting, subtracting and regrouping in base...

In this addition review worksheet, students use problem solving skills to solve 35 problems that require them to add 1 digit numbers with regrouping.

In this subtraction practice learning exercise, students use their math skills to solve 20 problems that require them to subtract 3 digit numbers without regrouping, borrowing, or trading.

In this addition practice worksheet, students use their math skills to solve 30 problems that require them to add 2 digit numbers without regrouping or carry-on.

In this addition practice worksheet, students use their math skills to solve 30 problems that require them to add 2 digit numbers without regrouping or carry-on.

In this subtraction practice worksheet, students use their math skills to solve 20 problems that require them to add 2 digit numbers without regrouping, borrowing, or trading.

In this subtraction practice worksheet, students use their math skills to solve 20 problems that require them to add 2 digit numbers without regrouping, borrowing, or trading.

In this subtraction learning exercise, student find the difference for 15 two, three and four digit subtraction problems that require regrouping. They work with numbers up to 1000.

In this subtraction activity, students find the differences in 15 problems in which they regroup as needed. They see black line pictures of dinosaurs and animals on the page.

In this subtraction worksheet, students find the differences in 15 two and three digit problems in which they regroup as needed. They see black line pictures of dinosaurs and animals on the page.

In this subtraction worksheet, students find the differences in 15 two and three digit problems in which they regroup as needed. They see black line pictures of dinosaurs and animals on the page.

In this subtraction learning exercise, students find the differences in 15 two and three digit problems in which they regroup as needed. They see black line pictures of dinosaurs and animals on the page.

In this subtraction worksheet, students solve 20 problems in which two digit numbers are subtracted. Regrouping will be required in some problems.

In this addition worksheet, students complete a total of 20 problems, adding one 3-digit number to another. All problems require regrouping. Answers are included on page 2.

In this addition worksheet, students complete a total of 20 problems, adding 3 digit numbers. Problems require regrouping. Answers are included on page 2.

In this addition worksheet, students solve 20 problems in which three digit numbers are added. There will be regrouping in each problem.

In this subtraction instructional activity, students line up the two-digit numbers in the correct column to subtract. Regrouping is necessary to complete the problems.

In this column subtraction with three-digit worksheet, students solve fifteen subtraction problems with three-digit numbers using regrouping.

In this four-digit subtraction worksheet, students solve fifteen subtraction problems that require regrouping when necessary.

In this column subtraction with five digits learning exercise, students rewrite 12 problems in column form, then subtract, using regrouping when needed.

In this adding mixed numbers with and without regrouping activity, students sharpen their problem solving skills as they solve 6 story problems.

In this 3 digit addition practice worksheet, students use their problem solving skills to solve 20 problems that require them to fill in the missing digits in 3 digit addition with regrouping and carry-on problems.

In this subtraction with two digits worksheet, students solve twelve two-digit subtraction problems using regrouping when needed.

In this math worksheet, students solve 100 problems in which one-digit numbers are added. This is a page of closely spaced basic addition facts written in a vertical format.