Video: Comparing Numbers within 100 Using Number Lines

Scarlett and Victoria are comparing numbers to the right and left of 61 on a number line. Who is correct?

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Video Transcript

Scarlett and Victoria are comparing numbers to the right and left of 61 on a number line. Who is correct?

The numbers on the right of 61 are greater than 61. The numbers on the left of 61 are greater than 61. We know that two girls, Scarlett and Victoria, are comparing numbers to the right and to the left of number 61 on a number line. One of the girls says that these numbers to the right of 61 are greater than 61. These numbers are 62, 63, 64, 65, and 66. What happened to the numbers as we counted to the right of the number 61? This is the same as counting forwards or counting on on a number line.

Let’s look more closely at what happens to the numbers as we count forwards or to the right on a number line. 61, 62, 63, 64, 65, 66. The numbers are increasing. They’re getting bigger by one each time. We started at 61. 61 has six tens and one one. When we counted to the right from 61, we finished on number 66. 66 also has six tens, but it has six ones. 66 is greater than 61. So we know these numbers are greater than 61. So this statement is correct.

The numbers on the right of 61 are greater than 61. The numbers to the left of 61 are less than 61. 60, 59, 58, 57, 56. These numbers are less than 61. The numbers on the right of 61 are greater than 61.

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