Mental calculation trick to teach children how to add up quickly

Is your child struggling with mental calculation operations? Maybe you need a couple of tricks that can help you, and a lot, improve. For example, in the case of sums, you can apply the approximation and decomposition in the sums with very large numbers. Write down this fantastic mental calculation

Is your child struggling with mental calculation operations? Maybe you need a couple of tricks that can help you, and a lot, improve. For example, in the case of sums, you can apply the approximation and decomposition in the sums with very large numbers.

Write down this fantastic mental calculation trick to teach children how to add quickly ... 'head'... and you will see the difference!

How is the mental calculation trick to teach children to add up quickly?

Actually this trick of mental calculation with sumsis based on two very important concepts in mathematics: approximation and decomposition. When a figure is very high, the best thing when adding it to another figure is to approximate one of the two to a ten, hundred or thousand to be able to add much faster. Or also, decompose it. We explain what is the mental trick to teach children to add quickly with examples:

1. Imagine that we have to add 1267 + 499. Well, what do we do? The number that can help us add up faster is 499, because it is very close to 500. We add 1 and we convert it to 500.

2. It is now easier to make a calculation 1267 + 500 is 1766 and do not forget to subtract now That number you had lent him: 1. Total? 1766.

3. We make another: 2569 + 487. The figure that we can approximate and that will be easier for us to add to the other is the small one. We are going to approximate 500, and remember that later you will have to subtract the 13 that you have just lent.

4. We add to 2569 and 500 and he gives us 3069. But remember that we have to remove him 13. Take 10 and he will give you 3059 and then 3 and you will have 3056 results. Finished!

5. But also we can use to add the decompositions fast. Imagine that you have to add 56 + 58. It would not be so complicated if it were 50 + 50 ... that gives us 100.

6. Then we add 6 and 8, which gives us 14 ... and add it to the 100 from before. Result? 114!

Well, approximations and decompositions is the best thing to do mental calculation with large sums. At first it may cost you a little, but you will see that if you practice often, it will be very useful at once.