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Video: Counting Backward on a Number Line to Subtract

Kerrie Lynskey

What is one less than 9?

00:37

Video Transcript

What is one less than nine?

To find one less than a number using a number line, we have to count back one place on the number line. Counting back one place is the same as finding one less or taking away one.

We can see that the number which is one less than nine is eight.