Yasuko Yamaguchi helps students add two numbers using an open number line.

Addition & subtraction strategies to solve two-digit equations using an open number line.

Miss James teaches you the valuable "counting on" strategy to help you solve tricky addition problems.

In this KS1 Maths article you'll learn what number lines are and how to add and subtract using them. We also have KS1 Maths videos, a quiz and lots of examples.

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 ...