Multiplying by 10-12

Many kids think that multiplying by 10, 11, and 12 are the hardest to do.

Actually they're not!

Their rules are easy. 😀

So let's review what they are!

When you **multiply a number by 10,** just add a 0 after the number and that's the answer.

Try to multiply these numbers quickly:

1 x 10=?

2 x 10=?

3 x 10=?

4 x 10=?

5 x 10=?

You got those answers right! 😀

Check the multiplication table for 10 for the rest of the numbers!

When you **multiply by a number by 11,** just duplicate the number and that's it!

Let's see how fast you can figure out the answers to these:

6 x 11=?

7 x 11=?

8 x 11=?

9 x 11=?

10 x 11=?

Here are the other numbers multiplied by 11:

Keep practicing! 😀

There's really no special rule for multiplying by 12.

But here's **a trick that can make multiplying by 12 easy.**

Let's say you have to multiply this:

12 x 4=?

We know that **12 **is equal to **10 + 2.**

Since it's easier to multiply by 10 and by 2, this is what we'll do:

**First,** we multiply the number by 2.

4x2=8

**Next,** we multiply the number by 10.

4x10=40

**Then,** we add the two products together.

8+40=48

That's the answer!

So, **12 x 4 = 48.**

Great work! 👏

Here are other numbers multiplied by 12:

Now, without looking at the table, can you tell the answer to this?

12 x 2=?

That's right!

It's 24!

What about this?

12 x 6=?

Correct!

It's 72!

Great job! 🎉

Now, you can try practice! 💪

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