Archived School textbook sales leader says Common Core is 'all about the money' (dailymail.co.uk)
submitted ago by Kar98
Posted by: Kar98
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Archived on: 2/12/2017 1:51:00 AM
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Archived School textbook sales leader says Common Core is 'all about the money' (dailymail.co.uk)
submitted ago by Kar98
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[–] svipbo ago
You want to know a trick to know the last digit for any times table entry? Take the complement of each number with 10, and the last digit of the product is the same.
For example: 8 X 6. Difficult, huh? But wait: 2 X 4 = 8. This reminds us that the answer is 48.