Smartick Try it for free! Abrir el Menú Móvil Try it for free!
Smartick is an online platform for children to master math in only 15 minutes a day
Try it for free!

Mar29

Mental Calculation: Addition by Breaking Up

In this post, we are going to learn an addition mental calculation strategy in order to be able to add two numbers, breaking them up into hundreds, tens, ones, etc. We can do this by breaking up just one number or breaking up both of them.

addition

Breaking up one number for addition:

It’s very simple, so let’s look at an example:

35 + 48

The first thing is to break up one of the two numbers into tens and ones:

48 = 40 + 8

Now, we add the tens to the first number, and after, the units:

35 + 40 + 8 = 75 + 8 = 83

Therefore, 35 + 48 = 83

Breaking up two numbers for addition:

Now, we will break up both numbers in the same way as before, and add the tens and the ones. Here is an example:

22 + 36

We break up the two numbers into tens and ones:

22 = 20 + 2

36 = 30 + 6

Now, we add the two tens together and then the two ones:

20 + 30 = 50

2 + 6 = 8

Finally, we add the sum of the tens sum and the sum of the ones:

50 + 8 = 58

Therefore, 22 + 36 = 58

We have seen two examples with double-digit numbers, but this addition can also be applied to bigger numbers.

For example: 165 + 246

Let’s add by only breaking up one number:

165 + 200 + 40 + 6

365 + 40 + 6

405 + 6

411

That concludes today’s post.

If you want to learn more math, register in Smartick today and try it for free.

Learn More:

Share on FacebookTweet about this on TwitterShare on LinkedIn
Content Creation Team.
A multidisciplinary and multicultural team made up of mathematicians, teachers, professors and other education professionals!
They strive to create the best math content possible.
Smartick

Add a new public comment to the blog:

The comments that you write here are moderated and can be seen by other users.
For private inquiries please write to [email protected]

Your personal details will not be shown publicly.

Privacy Policy