Video: Comparing Teen Numbers Represented by Base Ten Blocks

Scarlett is using base ten blocks to help her compare numbers. Which is bigger? [A] 8 [B] 3 Which is bigger? [A] 18 [B] 13 Pick the correct symbol to compare the numbers. 18 _ 13 [A] < [B] = [C] >

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Video Transcript

Scarlett is using base 10 blocks to help her compare numbers. Which is bigger, eight or three? Which is bigger, 18 or 13? Pick the correct symbol to compare the numbers. 18 is less than 13, 18 is equal to 13, or 18 is greater than 13.

This question is all about comparing numbers. First, we have to compare the numbers eight and three and decide which is bigger. One way to compare the numbers would be to look at the size of the group. We can see that eight squares is more than three squares. The group with eight has more. The group with three has less. When we’re counting, the number eight comes after the number three, three, four, five, six, seven, eight. We know when we’re counting forwards, the numbers get bigger. Eight is bigger than three.

Now we have to compare the numbers 18 and 13. We can see the number 18 has been broken apart into one ten and eight ones. 18 is 10 and eight ones. And the number 13 has been broken apart into a 10 and three ones. We already know that eight is more than three, so 10 and eight ones must be worth more than 10 and three ones. So the number which is bigger or worth more is the number 18. The final part of this question asks us to pick the correct symbol to compare the numbers 18 and 13.

This first symbol means less than. 18 is not less than 13. It’s more than 13. We know this isn’t the correct symbol, and this symbol means equal to. 18 is not equal to 13; it’s worth more. So it must be this symbol, greater than. The correct symbol to compare the numbers is greater than because 18 is greater than 13.

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