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Chapter 1: Q66. (page 16)

SHORT RESPONSE

Simplify:10+1523梅722鈭�2

Step 1:[10+15(8)]梅[7(4)鈭�2]

Step 2:[10+120]梅[28鈭�2]

Step 3:130梅26

Step 4:15

Which is the first incorrect step? Explain the error.

Short Answer

Expert verified

In the given steps the error is in step 4.

Step by step solution

01

Step 1. Finding division.

It is known thata梅b means a divided by. That is a梅b=ab.

02

Step 2. Example of applying BODMAS rule.

The expression (2+3)25(4鈭�3)can be written as

(2+3)25(4鈭�3)=525(1)鈥夆赌夆赌夆赌夆赌夆赌夆赌夆赌夆赌夆赌夆赌夆赌夆赌夆赌夆赌夆赌夆赌夆赌夆赌夆赌�=5脳55脳1鈥夆赌夆赌夆赌夆赌夆赌夆赌夆赌夆赌夆赌夆赌夆赌夆赌夆赌夆赌夆赌夆赌夆赌夆赌夆赌�=255鈥夆赌夆赌夆赌夆赌夆赌夆赌夆赌夆赌夆赌夆赌夆赌夆赌夆赌夆赌夆赌夆赌夆赌夆赌夆赌�=5

03

Step 3. DESCRIPTION OF STEP.

In step 4, it is given that,130梅26 that is 130 divided by 2.6

Therefore,130梅26=13026=5

Which gives the final answer to be 5.

Hence, the error is in the calculation of step 4.

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