Lesson

When we count on a number line, counting by 10's or finding numbers that can make 10 will help us.

Drag the slider to different numbers to see different pairs that add to 10.

Each number from 0 to 10 can be added to another number to get 10.

Which of the following pairs of numbers add to 10?

A

3 and 7

B

2 and 8

C

5 and 5

D

1 and 9

Worked Solution

Idea summary

Each number from 0 to 10 can be added to another number to get 10.

When we are counting, what happens when our number moves from the tens to the hundreds? In this video, we see how to continue counting by 1,2,5, or 10. We also look at how to count from hundreds to thousands, and thousands to tens of thousands.

Using the image of the number line below, what is the next number in the pattern?

988,\, 993,\, 998,\, ⬚

Worked Solution

Idea summary

When we count with numbers near 100, 1000, or 10\,000, a number line is really useful to see where we end up.

We can also break apart numbers in different ways, in order to help us count. Like in the image below, we could add 2 and then add 3, or we can add 5 in one jump.