BODMAS C7

Find the value of 20 – 10 + 6 – 7 + 8 – 3

Solution

Here we use BODMAS

There is only addition and subtraction, we add first before we subtract.

= 20 – 10 + 6 – 7 + 8 – 3

= 20 + 6 + 8 – 10 – 7 – 3    (rearranging positives and negatives)

= 34 – 10 – 7 – 3    (dealing with positives first we get 34)

= 27 – 20    (then we add the negatives to get -20)

= 7    (then we get 7 after subtraction)

Hence 20 – 10 + 6 – 7 + 8 – 3 = 7