Examples with solutions for Parentheses in advanced Order of Operations: Solving the problem

Exercise #1

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

Video Solution

Step-by-Step Solution

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

85+5=90 85+5=90

We should obtain the following expression:

90:10=9 90:10=9

Answer

9

Exercise #2

10(104):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

10(104):2=106:2=103=7 10-(10-4):2= \\ 10-6:2= \\ 10-3=\\ 7 Therefore the correct answer is answer D.

Answer

7 7

Exercise #3

(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 #4

Solve the following:

18(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:

18(3+3)=186=12 18-(3+3)= \\ 18-6= \\ 12 Therefore the correct answer is answer A.

Answer

12

Exercise #5

2×(36+9)= 2\times(\sqrt{36}+9)=

Video Solution

Step-by-Step Solution

Let's solve this problem step by step using the order of operations (PEMDAS: Parentheses, Exponents, Multiplication/Division, Addition/Subtraction):

1. First, let's focus on what's inside the parentheses: 36+9 \sqrt{36}+9

2. We need to evaluate the square root first:

  • 36=6 \sqrt{36} = 6 (because 6×6=36 6 \times 6 = 36 )

3. Now our expression looks like this: 2×(6+9) 2\times(6+9)

4. Next, we perform the addition inside the parentheses:

  • 6+9=15 6 + 9 = 15

5. Our expression is now: 2×15 2\times15

6. Finally, we perform the multiplication:

  • 2×15=30 2 \times 15 = 30

Therefore, 2×(36+9)=30 2\times(\sqrt{36}+9) = 30

This matches the provided correct answer of 30.

Answer

30

Exercise #6

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

Exercise #7

(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 #8

(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

Now let's solve the multiplication problem:

15×10=150 15\times10=150

Answer

150 150

Exercise #9

(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

Now we'll get the exercise:

10×9+4 10\times9+4

We'll put 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 #10

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 #11

(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 #12

(13×2)(12×1.5)= (13\times2)-(12\times1.5)=

Video Solution

Step-by-Step Solution

According to the order of operations, we will first solve the multiplication exercises in parentheses:

(13×2)=26 (13\times2)=26

(12×1.5)=18 (12\times1.5)=18

Now we will subtract:

2618=8 26-18=8

Answer

8 8

Exercise #13

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 #14

(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 #15

19×(204×5)= 19\times(20-4\times5)=

Video Solution

Step-by-Step Solution

First, we solve the exercise in the parentheses

(204×5)= (20-4\times5)=

According to the order of operations, we first multiply and then subtract:

2020=0 20-20=0

Now we obtain the exercise:

19×0=0 19\times0=0

Answer

0

Exercise #16

[(42)2]3= [(4-2)^2]^3=

Video Solution

Step-by-Step Solution

To solve the expression [(42)2]3 [(4-2)^2]^3 , we need to follow the order of operations, often remembered by the acronym PEMDAS (Parentheses, Exponents, Multiplication and Division, Addition and Subtraction).

Step 1: Solve the innermost parentheses:

The expression inside the innermost parentheses is 424-2. We perform the subtraction:

42=24-2 = 2

Step 2: Apply the exponentiation:

Next, we take the result of the subtraction and apply the squaring operation ((2)2)((2)^2):

22=42^2 = 4

Step 3: Apply the outer exponentiation:

Finally, we take the result of the previous step and raise it to the power of 3:

43=644^3 = 64

Therefore, the value of the expression [(42)2]3 [(4-2)^2]^3 is 6464.

Answer

64

Exercise #17

2×(3+12×8)= 2\times(3+\frac{1}{2}\times8)=

Video Solution

Step-by-Step Solution

According to the order of operations in arithmetic, parentheses take precedence over everything else.

Inside the parentheses, we will first solve the multiplication problem and then add.

To make solving the multiplication problem easier, we will convert 8 to a simple fraction:

2×(3+12×81)=2×(3+82)=2×(3+4) 2\times(3+\frac{1}{2}\times\frac{8}{1})=2\times(3+\frac{8}{2})=2\times(3+4)

Now we will solve the addition problem inside the parentheses and finally multiply:

2×7=14 2\times7=14

Answer

14 14

Exercise #18

10(104):2= 10-(10-4):2=

Video Solution

Answer

7

Exercise #19

(2+1×2)2= (2+1\times2)^2=

Video Solution

Answer

16

Exercise #20

187×(85)= 187\times(8-5)=

Video Solution

Answer

561 561