Lesson 5

Find Prime Factors

Est. Class Sessions: 1

Daily Practice and Problems

Teacher Notes
X

TIMS Task

Students explored divisibility rules in Grade 4 Unit 7. Students can also use their calculators to test divisibility.

  1. 2
  2. 2 and 3
  3. 2
  4. 3
  5. 2 and 3
  1. 258 and 1032 are divisible by 6.
  2. A number that is divisible by 2 and 3 is also divisible by 6.

P. Divisibility Rules

A number is divisible by 2 if dividing it by 2 gives a whole number. If a number is divisible by 2, then 2 is one of its factors.

Tell which numbers below are divisible by 2. Tell which numbers below are divisible by 3. Remember, a number is divisible by 3 if the sum of its digits is divisible by 3.

  1. 26
  2. 258
  3. 368
  4. 939
  5. 1032
  1. Which numbers above are divisible by 6?
  2. Write the divisibility rule for 6.