Tuesday, December 4, 2012

Correct worksheets on dividing decimals 3-6 A, 3-6 B, 3-6 C the even problems.

Start working on the divisibility rules.


A number is divisible by 2 if it is even.

A number is divisible by 3 if the sum of the digits is divisible by 3.

A number is divisible by 4 if the last two digits of the number is divisible by 4.

A number is divisible by 5 if the number ends in a 0 or a 5.

A number is divisible by 6 if the number is divisible by both 2 and 3.

There is no divisibility rule for the number 7.

A number is divisible by 8 if the last three digits of the number is divisble by 8.

A number is divisible by 9 if the sum of the digits is divisible by 9.

A number is divisible by 10 if the number ends in a 0.

Describe the difference between a prime number and a composite number.

• A prime number has only two factors, 1 and itself
• A composite number has more than two factors.

Assign worksheet 4.1-B on Divisibility.