Question

What is `4(7-2)-1`?

Answer 1

19

Explanation:

Remember the order of operations if you get hurt in PE Call an MD AsSoonaspossible. ( created by students at Carr Junior High Santa Ana)

P = parathesis
E = exponents.
MD = Multiple and Division ( a medical doctor is one person so do them at the same time from left to right )
AS = Addition and Subduction ( As soon as possible is one time so do them at the same time from left to right)

`t. 4 ( 7-2) = 4 ( 5)` Do the inside of the parenthesis first.

`4 ( 5) = 20` Do multiplication and division next

`20 -1 = 19` Do addition and addition next

The answer is 19

Answer 2

`19`

Explanation:

Count the number of terms first. they are separated by `+ and -`
signs.

Each term is simplified to one number and they are added or subtracted in the last step.

Within a term, always do brackets first.

Then the operations from strongest to weakest:

• powers and roots
• multiply and divide
• add and subtract

In this expressions, There are two terms:

`color(blue)(4(7-2))" "color(red)(-" "1)`
`" "darr`
`= 4color(blue)((5))" "color(red)(-" "1)`

`= color(blue)(20)" "color(red)(-" "1)`

`=19`