Parentheses in the Order of Operations

Opening parentheses and solving everything inside them is the first step in the order of operations.
In every exercise, we first solve what is inside of the parentheses.
We write the result above the parentheses in a small arc or in place of the entire expression inside the parentheses.
If multiplication and division appear inside the parentheses along with addition and subtraction, multiplication and division come first, and only then do we proceed to addition and subtraction from left to right.

Upon completion we proceed to -
Multiplication and division in order, from left to right.
Progressing to-
Addition and subtraction in order, from left to right.

Visual representation of BODMAS/PEMDAS rule emphasizing Brackets (Parentheses) as the first step in arithmetic problem-solving, crucial for accurate mathematical operations.

Suggested Topics to Practice in Advance

  1. Addition and Subtraction

Practice Parentheses in simple Order of Operations

Examples with solutions for Parentheses in simple Order of Operations

Exercise #1

(159)×(73)= (15-9)\times(7-3)=

Video Solution

Step-by-Step Solution

According to the order of operations rules, we must first solve the expressions inside of the parentheses:

159=6 15-9=6

73=4 7-3=4

We obtain the following expression:

6×4=24 6\times4=24

Answer

24 24

Exercise #2

8×(5×1)= 8\times(5\times1)=

Video Solution

Step-by-Step Solution

According to the order of operations, we first solve the expression in parentheses:

5×1=5 5\times1=5

Now we multiply:

8×5=40 8\times5=40

Answer

40

Exercise #3

20(1+9:9)= 20-(1+9:9)=

Video Solution

Step-by-Step Solution

First, we solve the exercise in the parentheses

(1+9:9)= (1+9:9)=

According to the order of operations, we first divide and then add:

1+1=2 1+1=2

Now we obtain the exercise:

202=18 20-2=18

Answer

18 18

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 equation:

(294):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:

294=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 #6

8:2(2+2)= 8:2(2+2)=

Video Solution

Step-by-Step Solution

Let's start with the part inside the parentheses. 

2+2=4 2+2=4
Then we will solve the exercise from left to right 

8:2=4 8:2=4
4×(4)=16 4 × (4)=16

The answer: 16 16

Answer

16

Exercise #7

Solve the following equation:

18(3+3)= 18-(3+3)=

Video Solution

Step-by-Step Solution

Let's begin by simplifying the expression following the order of operations.

P- PARENTHESES

E-EXPONENTS

D-DIVISION

A-ADDITION

S-SUBTRACTION

18(3+3)=186=12 18-(3+3)= \\ 18-6= \\ 12

Therefore the correct answer is answer D.

Answer

12

Exercise #8

187×(85)= 187\times(8-5)=

Video Solution

Step-by-Step Solution

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

187×8187×5= 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.

187×8 187\\\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.

187×5 187\\\times5

We get the result: 935

Now we'll get the problem:

1496935= 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.:

1496935 1496\\-935

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

Answer

561 561

Exercise #9

10+2×(3+1)= 10 + 2 \times (3 + 1) =

Step-by-Step Solution

1. Follow the order of operations (PEMDAS/BODMAS).

2. First do the operation inside the parenthesis: 3+1=43 + 1 = 4.

3. Then, perform the multiplication: 2×4=82 \times 4 = 8.

4. Finally, perform the addition: 10+8=1810 + 8 = 18.

Answer

18

Exercise #10

(30+6):4×3= (30+6):4\times3=

Video Solution

Step-by-Step Solution

According to the order of operations, first we solve the exercise within parentheses:

30+6=36 30+6=36

Now we solve the exercise

36:4×3= 36:4\times3=

Since the exercise only involves multiplication and division operations, we solve from left to right:

36:4=9 36:4=9

9×3=27 9\times3=27

Answer

27

Exercise #11

Solve the following problem using the order of operations:

(166)×9+(73)= (16-6)\times9+(7-3)=

Video Solution

Step-by-Step Solution

According to the order of operations, we'll first solve the exercises in parentheses:

(166)=10 (16-6)=10

(73)=4 (7-3)=4

We should obtain the following exercise:

10×9+4 10\times9+4

We'll place the multiplication exercise in parentheses to avoid confusion in the rest of the solution:

(10×9)+4= (10\times9)+4=

According to the order of operations, we'll solve the multiplication exercise and then add:

90+4=94 90+4=94

Answer

94 94

Exercise #12

(126+9)×(7+3)= (12-6+9)\times(7+3)= ?

Video Solution

Step-by-Step Solution

According to the order of operations, we will first solve the expressions in parentheses and then multiply:

(126+9)=(6+9)=15 (12-6+9)=(6+9)=15

(7+3)=10 (7+3)=10

Then solve the multiplication exercise:

15×10=150 15\times10=150

Answer

150 150

Exercise #13

(8:4:2)31= (8:4:2)-3-1=

Video Solution

Step-by-Step Solution

According to the rules of the order of operations, we first solve the exercise within parentheses from left to right:

8:4=2 8:4=2

2:2=1 2:2=1

Now we get the exercise:

131= 1-3-1=

We solve the exercise from left to right:

13=2 1-3=-2

21=3 -2-1=-3

Answer

3-

Exercise #14

Solve the exercise:

2×3(4+5):2= 2\times3-(4+5):2=

Video Solution

Step-by-Step Solution

According to the rules of the order of operations, we first solve the exercise within parentheses:

4+5=9 4+5=9

Now we obtain the exercise:

2×39:2= 2\times3-9:2=

We place in parentheses the multiplication and division exercises:

(2×3)(9:2)= (2\times3)-(9:2)=

We solve the exercises within parentheses:

2×3=6 2\times3=6

9:2=4.5 9:2=4.5

Now we obtain the exercise:

64.5=1.5 6-4.5=1.5

Answer

1.5 1.5

Exercise #15

12:3(1+1)= 12:3(1+1)=

Video Solution

Step-by-Step Solution

First, we perform the operation inside the parentheses:

12:3(2) 12:3(2)

When there is no mathematical operation between parentheses and a number, we assume it is a multiplication.

Therefore, we can also write the exercise like this:

12:3×2 12:3\times2

Here we solve from left to right:

12:3×2=4×2=8 12:3\times2=4\times2=8

Answer

8