Video: Finding the Product of Two Numbers by Adding On to a Given Related Product

Kerrie Lynskey

Anthony knows the answer to 5 × 8. Tell him what number to add to 5 × 8 to get the answer to 6 × 8.

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Video Transcript

Anthony knows the answer to five times eight. Five times eight equals 40. Tell him what number to add to five times eight to get the answer to six times eight.

We know that five times eight is 40. And five times eight is the same as adding together five eights. If we add another eight to 40, we will get 48. Six times eight or eight plus eight plus eight plus eight plus eight plus eight equals 48.

Anthony would need to add another eight to get the answer to six times eight. The answer is eight.

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