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MULTIPLICATION LESSON #5. Multiplying by 5. VOCABULARY. The prefix “ penta ” means five of something. Examples : pentagon -- 5 sided polygon pentathlon -- a sporting event composed of 5 separate events pentagram -- 5 pointed star. HOW TO MULTIPLY BY FIVE (5).

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multiplication lesson 5

MULTIPLICATION LESSON #5

Multiplying by 5

vocabulary
VOCABULARY
  • The prefix “penta” means five of something.
  • Examples:

pentagon-- 5 sided polygon

pentathlon -- a sporting event composed of

5 separate events

pentagram -- 5 pointed star

how to multiply by five 5
HOW TO MULTIPLY BY FIVE (5)
  • Rule: When you multiply by five, there will either be a 0 or a 5 in the ones place.

Example: 2 x 5 = 10; 3 x 5 = 15;4 x 5 = 20;5 x 5 = 25

  • Groups: There are 5 groups.

Example: 5 x 5 = 25; There are 5 groups of 5

how to multiply by five 51
HOW TO MULTIPLY BY FIVE (5)
  • Addition: Add the number 5 times.

Example a: 5 x 3 = 15

3+3+3+3+3=15 (add 3 five times)

5+5+5=15 (add 5 three times)

Example b: 5 x 4 = 20

4+4+4+4+4=20 (add 4 five times)

5+5+5+5=20 (add 5 four times)

how to multiply by five 52
HOW TO MULTIPLY BY FIVE (5)
  • Number patterns: Count by fives.

Example: 5 x 9 = 45 or 5, 10, 15, 20, 25, 30, 35, 40, 45

6 x 5 = 30 or 5, 10, 15, 20, 25, 30

5 x 12 = 60 or 5, 10, 15, 20, 25, 30, 35, 40, 45, 50, 55, 60

  • Arrays: 5 rows of 3 is 15 3 rows of 5 is 15

5 x 3 = 15 3 x 5 = 15

how to multiply by five 5 word problem
HOW TO MULTIPLY BY FIVE (5)word Problem
  • A cupcake factory produced 4 packages of cupcakes. There were 5 cupcakes in each package. How many cupcakes did the factory produce in all? Use pictures, numbers and words to solve the problem.

20

5

5

5

5

5 cupcakes x 4 packages = 20 cupcakes

5, 10, 15, 20

4, 8, 12, 16, 20

The factory produced 20 cupcakes in all. I solved this problem by adding 5 + 5 + 5 + 5 = 20 cupcakes or 5 cupcakes x 4 packages = 20 cupcakes in all.

how to multiply by five 5 word problem1
HOW TO MULTIPLY BY FIVE (5)word Problem
  • Now it’s your turn...
  • Ganeev, Jennifer and Gurjot were having a bake sale. Each one of them baked five cookies, how many cookies did they have altogether?

20

5

5

5

5 cookies x 3 students = 15 cookies

5, 10, 15,

3, 6, 9, 12, 15

The kids baked 15 cookies altogether. I solved this problem by adding 5 + 5 + 5 = 15 cookies or 5 cookies x 3 students = 15 cookies in all.

how to multiply by five 5 helpful links
HOW TO MULTIPLY BY FIVE (5) HELPFUL LINKS
  • YouTube Songs
  • http://www.youtube.com/watch?v=wkfWBH9i33E
  • http://www.youtube.com/watch?v=MaiIZU2BIwg&feature=fvwrel
  • School House Rock: Counting By Fives
  • http://www.youtube.com/watch?v=NUHFzH06HqU
how to multiply by five 5 helpful links1
HOW TO MULTIPLY BY FIVE (5) HELPFUL LINKS
  • Online Multiplication Game: Flying High
  • http://www.multiplication.com/games/play/flying-high
5 x 6
5x6

30

5 x 61
5x6

30

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