Being able to remember our multiplication facts will help us be able to solve problems in this lesson. Let's try a practice problem.
What is 6 \times 3?
There are different ways to solve multiplication, including repeated addition and using arrays. We can also multiply our numbers in a different order, so 3\times4 has the same answer as 4\times3.
This video looks at how we can tell if a number is divisible by 2,\,5 or 10.
Are the following numbers divisible by 5?
6168
3625
A number is divisible by 2 if it is even.
A number is divisible by 5 if it ends in a 0 or 5.
A number is divisible by 10 if it ends in a 0.
This video looks at divisibility by 3 and 9.
Which of the following numbers are exactly divisible by 3?
A number is divisible by 3 if the sum of its digits is divisible by 3.
A number is divisible by 9 if the sum of its digits is divisible by 9.
This video looks at how we can tell if a number is divisible by 4,\,6 or 8.
Are the following numbers divisible by 4?
58\,784
372\,938
A number is divisible by 4 if it can be halved twice, or the last 2 digits are divisible by 4.
A number is divisible by 6 if it is even and the sum of its digits is divisible by 3.
A number is divisible by 8 if it can be halved three times.