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What’s a whole number?

What’s a whole number?. What is a whole number (and what isn’t?). Whole numbers give us an amount of whole things – not parts (fractions), and not negative amounts. Zero is a whole number (because we could have zero whole things). 0, 5, 17, 443 and 19,098 are all whole numbers.

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What’s a whole number?

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  1. What’s a whole number?

  2. What is a whole number (and what isn’t?) • Whole numbers give us an amount of whole things – not parts (fractions), and not negative amounts. • Zero is a whole number (because we could have zero whole things). • 0, 5, 17, 443 and 19,098 are all whole numbers. • -3, 4 ½ , 0.3 and 5.102 are *not.*

  3. What are integers? • All the whole numbers are integers… and so are negative numbers, *if* they don’t have fractions or decimals. • -3 is an integer. • 445 is an integer. • 3.4 is not an integer; -4 ½ is not an integer. • So – integers can be positive or negative or zero, but they can’t have the “in between” numbers that fractions and decimals stand for.

  4. Whole numbers or not? • 3 14 3.333… -10 • 4.4 0 3333 -3.333 • 91 5 1/3 -5 1/3 500

  5. Whole numbers or not? • 3 YES 14 YES 3.333… NO -10 NO • 4.4 NO 0 YES 3333 YES -3.333 NO • 91 YES 5 1/3 NO -5 1/3 NO 500 YES

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