Space to play or pause, M to mute, left and right arrows to seek, up and down arrows for volume. Hi, my name is Miss James and I can't wait to find out just how clever you are in our lesson today. For ...

Column subtraction is a way of subtracting larger numbers. It is called column subtraction, because you write one number underneath the other, using place value to sort the tens and ones in separate ...

Count back & use the relationship between addition and subtraction to subtract within 20. Warm up with a Mystery Math Mistake to find the error in DC's addition. Use ...

Before taking part in the quiz make sure you have a pencil or pen and a piece of paper ready for writing down your answers - better still, print off our answer sheet below. Use your mental maths ...

Explains the concept of zero in mathematics, emphasizing its role as a number that represents the empty set. It illustrates how zero is used in addition and subtraction, showing that adding or ...

Students put all of their addition and subtraction skills together to solve equations. In this lesson, students put all of their addition and subtraction skills together to solve equations. Julia ...

This study examined Korean second and third graders' understanding of multidigit addition and subtraction and particularly their ability to explain the trading required when a column sum of the ...