Using brackets and how to use it — lesson. Mathematics CBSE, Class 6.

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On Monday, Anand purchased

$8$ chocolates each for

$₹10$ . On Tuesday, he purchased

$3$ chocolates each for

$₹10$ again. How much he spent in both the days for chocolates.

This can be done in two ways:

Monday spent $+$ Tuesday spent $=$ $8 \times 10 + 3 \times 10 = 80 + 30 = 110$ .
Total number of chocolates he purchased in both the days $×$ Amount spent for each chocolate $=$ $8 + 3 \times 10 = 11 \times 10 = 110$ .

There are some confusions in the calculation. Which operation has to be done first?

Whether we have to multiply

$3$ by

$10$ first and then add with

$8$ or we have to add

$8$ and

$3$ and multiply by

$10$ ?

To get a clear view in order of operation, we have to insert brackets.

First, reduce the number which is present inside the bracket

$( )$ into a single number and then do the operation outside.

Did you find an error?

8. Using brackets and how to use it