Order of Operations with Parentheses

๐Ÿ†Practice parentheses in advanced order of operations

In previous articles, we have seen what is the order of operations for addition, subtraction, multiplication, and division and also the order we must follow when there are exponents.

When the exercise we need to solve includes parentheses, we always (always!) start with the operation contained within them.

  1. Parentheses
  2. Exponents and roots
  3. Multiplications and divisions
  4. Additions and subtractions

Reminder: when an exercise presents operations that have the same precedence, that is, multiplications and divisions or additions and subtractions, we will solve the exercise from left to right.

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Test yourself on parentheses in advanced order of operations!

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\( 187\times(8-5)= \)

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Below, we present to you some examples

Example 1

4+(6:2)=4+(6:2)=
In this exercise, we will start by solving the operation inside the parentheses, and then the rest:
4+(6:2)=4+(3)=4+3=74+(6:2)=4+(3)= 4+3 = 7


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Example 2

5+8โ‹…3โˆ’(8:4)=5+8\cdot3-(8:4)=
We'll start by solving the operation inside the parentheses:
5+8โ‹…3โˆ’2=5+8\cdot3-2=
Next, we continue with the multiplications:
5+24โˆ’2=5+24-2=
Finally, we add and subtract:
5+24โˆ’2=275+24-2=27


Example 3

1+9โ‹…15โˆ’(9:3)=1+9\cdot15-(9:3)=
We'll start by solving the operation inside the parentheses:
1+9โ‹…15โˆ’3=1+9\cdot15-3=
Next, we continue with the multiplications:
1+135โˆ’3=1+135-3=
Finally, we add and subtract:
1+135โˆ’3=1331+135-3=133


Do you know what the answer is?

Example 4

(21+3)โ‹…2โ‹…โก4โˆ’(22:2)= (21+3)\cdot2\operatorname{\cdot}4-(22:2)=

We will start by solving the operation inside the parentheses:
24โ‹…2โ‹…โก4โˆ’11= 24\cdot2\operatorname{\cdot}4-11=

Next, we continue with the multiplications:
48โ‹…โก4โˆ’11= 48\operatorname{\cdot}4-11=

192โˆ’11= 192-11=

Finally, we add and subtract:
192โˆ’11=181 192-11=181


Example 5

(1+9)+(15โ‹…8)โˆ’(8:2)= (1+9)+(15\cdot8)-(8:2)=

Let's start by solving the operation inside the parentheses:
(10)+(120)โˆ’(4)= (10)+(120)-(4)=

Finally, we add and subtract:
10+120โˆ’4=126 10+120-4=126


That is, the order in all exercises will be as follows:

  1. Parentheses
  2. Exponents and roots
  3. Multiplications and divisions
  4. Additions and subtractions

Reminder: when an exercise includes operations that have the same precedence, that is, multiplication and division or addition and subtraction, we will solve the exercise from left to right.


Examples and Exercises with Solutions on Order of Operations with Parentheses

Exercise #1

187ร—(8โˆ’5)= 187\times(8-5)=

Video Solution

Step-by-Step Solution

We'll use the distributive property and multiply each term in parentheses by 187:

187ร—8โˆ’187ร—5= 187\times8-187\times5=

Let's solve the first multiplication problem vertically, making sure to solve it correctly, meaning units times units, units times tens, units times hundreds.

187ร—8 187\\\times8

We get the result: 1496

Let's solve the second multiplication problem vertically, making sure to solve it correctly, meaning units times units, units times tens, units times hundreds.

187ร—5 187\\\times5

We get the result: 935

Now we'll get the problem:

1496โˆ’935= 1496-935=

We'll solve this vertically as well. We'll make sure to align the digits properly, units under units, tens under tens, etc.:

1496โˆ’935 1496\\-935

We'll subtract units from units, tens from tens, etc., and get the result: 561 561

Answer

561 561

Exercise #2

Solve the following equation:

(29โˆ’4):5= (29-4):5=

Video Solution

Step-by-Step Solution

Let's simplify this expression while maintaining the order of operations.

Let's start by solving what's in the parentheses:

29โˆ’4=25 29-4=25

Now we get the expression:

25:5= 25:5=

In the next step, to make the division easier, we'll break down 25 into two smaller factors that are divisible by 5:

(20+5):5= (20+5):5=

Let's divide each factor in the parentheses by 5:

(20:5)+(5:5)= (20:5)+(5:5)=

We'll solve each expression in the parentheses and obtain:

4+1=5 4+1=5

Answer

5 5

Exercise #3

Solve the following expression:

10โˆ’(10โˆ’4):2= 10-(10-4):2=

Video Solution

Step-by-Step Solution

Let's simplify this expression while following the order of operations which states that exponents come before multiplication and division, which come before addition and subtraction, and that parentheses come before all of them,

Therefore we'll start by simplifying the expression inside the parentheses and perform the subtraction within them, then since division comes before subtraction, we'll first perform the division operation and then the subtraction operation

10โˆ’(10โˆ’4):2=10โˆ’6:2=10โˆ’3=7 10-(10-4):2= \\ 10-6:2= \\ 10-3=\\ 7 Therefore the correct answer is answer D.

Answer

7 7

Exercise #4

Solve the following expression:

(85+5):10= (85+5):10=

Video Solution

Step-by-Step Solution

Let's simplify this expression while following the order of operations which states that exponents come before multiplication and division, which come before addition and subtraction, and that parentheses come before all of them,

We will therefore start by simplifying the expression inside the parentheses and calculate the result of the addition within them, then - we will first perform the division operation:

(85+5):10=90:10=9 (85+5):10= \\ 90:10= \\ 9

Therefore, the correct answer is answer A.

Answer

9 9

Exercise #5

Solve the following expression:

18โˆ’(3+3)= 18-(3+3)=

Video Solution

Step-by-Step Solution

Let's simplify this expression while following the order of operations which states that exponents come before multiplication and division, which come before addition and subtraction, and that parentheses come before all of them,

Therefore we'll start by simplifying the expression in parentheses, and perform the addition operation in this expression, then we'll perform the subtraction operation that applies to the expression in parentheses:

18โˆ’(3+3)=18โˆ’6=12 18-(3+3)= \\ 18-6= \\ 12 Therefore the correct answer is answer A.

Answer

12

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