In fourth grade, students focus most on using all four operations - addition, subtraction, multiplication, and division - to solve multi-step word problems involving multi-digit numbers. Fourth-grade ...

The common-core math standards require that students learn the standard algorithm for multi-digit adding and subtracting—you know, the process in which you line the numbers up vertically to add or ...

When you are solving an addition calculation with a two-digit number, you need to think about tens and ones. A place value chart can help you to see the value of each digit in a number. For example, ...

Lynda Colgan receives funding from SSHRC, NSERC, The Council of Ontario Directors of Education, The Ministry of Education for the Province of Ontario, The Mathematics Knowledge Network (The Fields ...

When you are adding larger numbers, it’s often better to use a written method. Column addition is a good written method to add one number to another. It involves putting the digits of each number into ...