Activity: Addition and subtraction methods. ... An easy number to work with could be a single digit number, or a multiple of 10, or a multiple of 100.

Let's explore addition and subtraction. This collection contains curriculum-relevant videos, quizzes and games to help Year 6 and P7 Maths students with: mental addition strategies; ...

Julia begins with a Number of the Day warm up activity, followed by practicing 2 and 3 addition and subtraction equations, with and without regrouping, using base 10 drawings, expanded from, ...

Join Mrs. McCartney for an addition number talk with D.C.! Math Mights | Subtraction with 2-Digit Numbers Part 2 | Season 2 | Episode 216 | PBS Skip to Main Content ...

The Common Core State Standards teach students the algorithm for multi-digit addition and subtraction in 4th grade. But some experts say it should be taught sooner.

Ellis showed a subtraction problem, performed both using the traditional regrouping, or borrow-and-carry, algorithm and using an example from the common core. Here’s a screenshot of the two methods.