Question

Meera bought 6 notebooks from the market and the cost was ` 10 per notebook.

Her sister Seema 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 × 10 + 7 × 10 6 + 7 =13

= 60 + 70

= 130 and 13 × 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 × 10.

Appu points out that 7 + 6 × 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

6 and 7 together using a bracket, indicating that the pack is to be treated as a single

number. Thus, the answer is found by (6 + 7) × 10 = 13 × 10.

This is what Meera did. She first added 6 and 7 and then multiplied the sum

by 10.

This clearly tells us : First, turn everything inside the brackets ( ) into a

single number and then do the operation outside which in this case is to

multiply by 10.​

Answer 1

Answer:

this question make the human crazy yarr

Answer 2

Answer:

The correct answer is 130, obtained by Meera and Seema's methods. Meera added 6 and 7, resulting in 13, and then multiplied the sum by 10.

Step-by-step explanation:

At the market, Meera and Seema equally purchased notebooks for themselves. The price of each notebook that Meera purchased was ten dollars. She purchased a total of six notebooks.

Therefore, she paid six notebooks times ten dollars each, which is sixty dollars. On the other hand, Seema purchased seven notebooks for a total cost of seventy or ten dollars for each notebook.

Therefore, she paid seven notebooks for ten dollars each, totalling seventy dollars. The price of the notebooks that both sisters purchased from the market came to sixty dollars and seventy dollars, or one hundred thirty dollars. This indicates that the total cost of purchasing the notebooks was one hundred and thirty dollars.

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