SUBJECTS: Maths YEARS: F–2. Learn the "counting back" strategy to help you solve tricky subtraction problems. In this lesson, Miss James demonstrates how to use a number line correctly, and she ...

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 ... in using it in your ...

Practice adding and subtracting within 20 using a Double 10-frame & number line. Represent a teen number ... a mystery math mistake and we'll add and subtract within 20. Let's warm up our math ...