Students in a grade 7 class were raising money for charity. Some students had a “bowl-a-thon”....

Students in a grade 7 class were raising money for charity. Some students had a “bowl-a-thon”.

This table shows the money that one student raised for different bowling times.

Time (h) Money Raised

($)

1 6

2 16

3 24

4 32

5 40

What patterns do you see in the table?

How long would the student have to bowl to raise $72?

What is meant by “divisibility rules”?A way to divide numbers quickly by following a pattern.

Why is it important?Divisibility rules help us find the factors of a number.

Copy down the following numbers.

78 27 35 410

123 2100 4126 795

Circle the ones that are divisible by 2.

Place a square around the ones that are divisible by 5.

Draw a triangle around the ones that divisible by 10.

A number is divisible by…2 If the whole number is even3 If the sum of the digits is divisible by 34 If the number formed by the last 2 digits is

divisible by 45 If the last digit is a 5 or a 06 If the number is divisible by 3 and is even8 If the number is divisible by 4 and the quotient

is even9 If the sum of the digits is divisible by 9

10 If it ends in 0

1) Choose 3 different colors.2) Using one color, circle the numbers that are

divisible by 2.3) Using a different color, circle all the numbers that

are divisible by 4.4) Using your last color, circle all the numbers that

are divisible by 8.

Be able to discuss the following:Describe the patterns that you found.

Sort the following numbers based on the divisibility rules for 3 and 5 using both Carroll and Venn Diagrams.

6, 8, 10, 15, 18, 25, 26, 36, 40, 45, 120

Carroll Diagram

Divisible by 3

Not Divisible by

3Divisible by

515 45

12010 25 40

Not Divisible by

5

6 36 18 8 26

Divisible by 5 Divisible by 3

8 26

102540

61836

1545120

Grade 6:

Work on page 14 then Pizazz sheet

Grade 7:

Work on pages 8 then 9 and the Pizazz sheet for final review