Question

1.4 Using Brackets
Seema bought 6 notebooks from the market and the cost was 10 per notebook.
Her sister Meera also bought 7 notebooks of the same type. Find the total money
they paid.
Seema calculated the
Meera calculated the
amount like this
amount like this
6 x 10 + 7 x 10
6 + 7 =13
= 60 + 70
130
and 13 x 10 = 130
Ans. 130
Ans. * 130
You can see that Seema's and Meera's ways to get the answer are a bit different.
But both give the correct result. Why?
Seema says, what Meera has done is 7 + 6 x 10.
Appu points out that 7 + 6 x 10 = 7 + 60 = 67. Thus, this is not what Meera
had done. All the three students are confused.
To avoid confusion in such cases we may use brackets. We can pack the numbers
ers 6 and 7 together using a bracket, indicating that the pack is to be treated as a single
bu number. Thus, the answer is found by (6 + 7) x 10 = 13 x 10.
nate
This is what Meera did. She first added 6 and 7 and then multiplied the sum
it.
ve
ver by 10.
1, i
This clearly tells us : First, turn everything inside the brackets ( ) into a
gir
single number and then do the operation outside which in this case is to
multiply by 10.​

Answer 1

Here is the answer for your question

Answer 2

Answer:

you can see that Seema and meera ways to get the ans are a bit different