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Earn +20 ptsQ: How can counting by tens help you multiply by tens?
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How do you use a shortcut to multiply tens by tens?
You add two zeros at the end of the answer 80*90=7200
How many tens are there in a hundred ninety two thousand?
simple. just multiply 192,000 by 10=1,920,000 tens
Who invented counting in tens?
Pre-historic humanoids who discovered that they had 10 digits on their hands.
What does deci-as in decimal mean?
It refers to ten. The decimal system is based on counting in tens.
Double your tens digit to get your ones digits?
That means multiply it by 2. If your tens digit is 3, your ones digit is 6.
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