Class V

Multiplication x11

Lesson

If you know your 10 times tables and you know your $1$1 times tables, then it won't be too hard to learn your $11$11 times tables! We know that $10+1=11$10+1=11 and that multiplication is looking at equal sized groups.

So $10$10 groups plus $1$1 group equals $11$11 groups!

Remember!

Any number multiplied by $1$1 is itself.

e.g. $1\times5=5$1×5=5, $1\times12=12$1×12=12, $1\times100=100$1×100=100 and so on.

So if we're given a question, such as $11\times6$11×6, we could think:

$10\times6$10×6	$=$=	$60$60
$1\times6$1×6	$=$=	$6$6
So $11\times6$11×6	$=$=	$60+6$60+6
	$=$=	$66$66

Pretty Patterns in the 11 Times Tables

Watch this video now to see the cool pattern in the $11$11 times tables that will make them easier to learn?

Discuss

What pattern did you see in the $11$11 times tables?
Why did it stop at $11\times9$11×9? (Hint:Think about place value.)

Worked Examples

Question 1

$1\times11$1×11

Question 2

$11\times2$11×2

Question 3

$11\times11$11×11