Question

How do you evaluate `15 - 2 +12 \times 2`?

Answer 1

See below

Explanation:

Use order of operations PEMDAS
In this case, we multiply first `15-2+24`
Now subtract `15-2`
`13+24`
`37`
=

Answer 2

`37`

Explanation:

When doing calculations which involved different operations, identify the individual TERMS first.
Terms are separated by `+ and -` signs,

Within each term, do:

• brackets first,
• then p0wers and roots
• then multiply and divide

Simplify each term to a single answer and then add or subtract them in the last step.

`color(red)(15)" "color(blue)(-2)" "color(forestgreen)( +12xx2)" "larr` there are 3 terms

`=color(red)(15)" "color(blue)(-2)" "color(forestgreen)( +24)`

It is a good idea to write the adds at the beginning and the subtracts at the end.

(In this case is does not matter, but this helps to avoid errors in other examples)

`= color(red)(15)" "color(forestgreen)( +24)" "color(blue)(-2)`

`= 37`