Video: Crossing Ten When Subtracting on a Number Line

Help Emma answer a subtraction problem. She wants to find 13 take away 7. First, she took away 3 to make 10. How much is left to take away? What is 13 take away 7?

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Video Transcript

Help Emma answer a subtraction problem. She wants to find 13 take away seven. First, she took away three to make 10. How much is left to take away? What is 13 take away seven? 13 take away seven equals what.

We know that Emma is subtracting seven from 13. She’s already taken away three. How much more does she need to take away? We know that seven is three and four. Let’s take away four more. One, two, three, four. We landed on number six. 13 take away seven equals six. First, we subtracted three to take us to 10. Then we subtracted four more. Seven is three and four more. 13 take away seven equals six.

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