Question Video: Representing Postive Numbers on the Number Line Mathematics • 1st Grade

Which label represents the number 70? [A] A [B] B [C] C

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Video Transcript

Which label represents the number 70? Is it A, B, or C?

We don’t know which numbers are represented by A, B, and C. But the numbers that we can see — 20, 40, and 60 — are all multiples of 10. Which number is 10 more than 20? 10 more than 20 is 30. So we know that A represents the number 30. Let’s keep counting forward in 10s. 40, 50. So we know that B is 50. The next number is 60. And 10 more than 60 is 70. So C is 70. So the label which represents the number 70 is C. On this number line, we’re counting in 10s. 20, 30, 40, 50, 60, 70. The label C represents the number 70.

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