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Divisibility Rules and Dividing by Zero

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Divisibility Rules and Dividing by Zero: page 1 of a printable Grade 7 Math worksheet
Grade 7 Math · Factors and Multiples

Divisibility Rules and Dividing by Zero

Divisibility rules worksheet for Grade 7: test four numbers for 2, 3, 4, 5, 6, 8, 9, and 10, then say why no number can be divided by 0 and why a digit sum shows divisibility by 9. With an answer key.

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Pages
1
Last updated
Time
About 15 minutes
Answer key
Included
Printing
Black and white
Related curriculum

List every factor pair of a number up to 100, tell whether a number is a multiple of another, sort numbers into primes and composites, and find the greatest common factor and the least common multiple.

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Reviewed by Mr. Daniel Carter, Teacher. How we check worksheets

How to use this sheet

  • Have the child find factors in pairs, starting at 1, and stop when the pairs start to repeat.
  • Keep a multiplication chart on hand for the first sheets, then take it away.
  • For multiples, have the child skip count aloud and write the first few in a row.

Common mistakes

  • Mixing up factors and multiples. Factors of 12 are 12 or smaller; multiples of 12 are 12 or larger.
  • Missing 1 and the number itself as factors. Always start the pair list with 1 and the number.
  • Calling 1 a prime number. A prime has exactly two factors; 1 has only one.
  • Calling every odd number prime. 9, 15 and 21 are odd but composite.

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