Lesson

Do you remember how to count forward from any number?

Complete the pattern by adding 2 each time.

40,42,44, ⬚, ⬚, ⬚

Worked Solution

Idea summary

To count forwards we add the numbers.

We can also count backwards from any number. Let's see how we can count backwards by 1,2,5, or 10.

Find the next number in the pattern:

44,\, 39,\,34,\,29,\,24,\,19,\, ⬚

Worked Solution

Idea summary

When we count backwards, our number gets smaller. We can use a number line to help us, by jumping left. Look at how we can count backwards by 2 below.

uses mental and written strategies for addition and subtraction involving two-, three-, four and five-digit numbers