Download Unit 1 Review

Name: __________________________________________________________________
Unit 1 Review
1. Make as many arrays as possible for the number 18. Write the number
model next each array.
2. Make an array for each of these number models. Be neat!
3 * 7 = 21
7 * 3 = 21
3. List all the factors of 42. Circle the factors that are prime numbers.
4. Make a factor rainbow to list all the factors of 56. Circle the factors that
are prime numbers.
5. List all the factor pairs for 28. Is 28 a prime or composite number? Why?
Name: __________________________________________________________________
6. A. Write an 8-digit number that has
4 in the ones place
5 in the hundred-thousands place,
6 in the thousands place,
2 in the hundredths place,
and 0 in all other places.
B. Write the numeral in words.
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7. Write the prime factorization for 81.
Write the prime factorization for 28 using exponents.___________________
8. Write the prime factorization for 36.
Write the prime factorization for 36 using exponents. __________________
9. Fill in the missing numbers.
22 = ________
32 = _________
82 = __________
16 = _________
121 = ________
25 = __________
10. Name a number greater than 100 that is divisible by 3, but not 2._______
11. Name a number great than 100 that is divisible by 2, 3, and 5. ________
Name: __________________________________________________________________