Examples with solutions for Powers and Roots: Solving the problem

Exercise #1

6+644= 6+\sqrt{64}-4=

Video Solution

Step-by-Step Solution

To solve the expression 6+644= 6+\sqrt{64}-4= , we need to follow the order of operations (PEMDAS/BODMAS):


  • P: Parentheses (or Brackets)
  • E: Exponents (or Orders, i.e., powers and roots, etc.)
  • MD: Multiplication and Division (left-to-right)
  • AS: Addition and Subtraction (left-to-right)

In this expression, we first need to evaluate the square root since it falls under the exponent category:


64=8 \sqrt{64} = 8


Next, we substitute the computed value back into the expression:


6+84 6+8-4


We then perform the addition and subtraction from left to right:


6+8=14 6+8 = 14


144=10 14-4 = 10


Thus, the final answer is:


10 10

Answer

10

Exercise #2

10:222= 10:2-2^2=

Video Solution

Step-by-Step Solution

The given mathematical expression is 10:222 10:2-2^2 .

According to the order of operations (often remembered by the acronym PEMDAS/BODMAS), we perform calculations in the following sequence:

  • Parentheses/Brackets
  • Exponents/Orders (i.e., powers and roots)
  • Multiplication and Division (from left to right)
  • Addition and Subtraction (from left to right)

In this expression, there are no parentheses, but there is an exponent: 222^2. We calculate the exponent first:

22=42^2 = 4

Substituting back into the expression, we have:

10:24 10:2-4

Next, we perform the division from left to right. Here, ":" is interpreted as division:

10÷2=5 10 \div 2 = 5

Now, substitute this back into the expression:

54 5 - 4

The final step is to perform the subtraction:

54=1 5 - 4 = 1

Therefore, the answer is 1 1 .

Answer

1

Exercise #3

3×3+32= 3\times3+3^2=

Video Solution

Step-by-Step Solution

Let's recall the order of operations:

  1. Parentheses

  2. Exponents and Roots

  3. Multiplication and Division

  4. Addition and Subtraction

There are no parentheses in this problem, so we'll start with exponents:

3*3+3² =

3*3+9 =

Let's continue to the next step, multiplication operations:

3*3+9 =

9 + 9 =

Now we're left with just a simple addition problem:

9+9= 18

And that's the solution!

Answer

18

Exercise #4

832:3= 8-3^2:3=

Video Solution

Step-by-Step Solution

Let's solve the expression step by step using the order of operations, often remembered by the acronym PEMDAS, which stands for Parentheses, Exponents, Multiplication and Division (from left to right), and Addition and Subtraction (from left to right).

The given expression is: 832:3= 8-3^2:3=

Step 1: Evaluate Exponents
The expression has an exponent, which we need to evaluate first. The exponent is 323^2.
Calculate 323^2 which equals 99.
Now the expression becomes: 89:3 8 - 9 : 3

Step 2: Division
Next, perform the division operation. Here we divide 99 by 33.
Calculate 9:39 : 3 which equals 33.
Now the expression becomes: 83 8 - 3

Step 3: Subtraction
Finally, perform the subtraction.
Calculate 838 - 3 which equals 55.

Therefore, the solution to the expression 832:38-3^2:3 is 55.

Answer

5 5

Exercise #5

4+2+52= 4+2+5^2=

Video Solution

Step-by-Step Solution

To solve the expression 4+2+52 4 + 2 + 5^2 , we need to follow the order of operations, often remembered by the acronym PEMDAS (Parentheses, Exponents, Multiplication and Division, Addition and Subtraction).

  • Step 1: Calculate Exponents
    In the expression we have an exponent: 525^2. This means 5 is raised to the power of 2. We calculate this first:
    52=255^2 = 25.

  • Step 2: Perform Addition
    Now, substitute the calculated value back into the expression:
    4+2+254 + 2 + 25.
    Perform the additions from left to right:
    4+2=64 + 2 = 6
    Finally add the result to 25:
    6+25=316 + 25 = 31.

Therefore, the final answer is 3131.

Answer

31

Exercise #6

4+22= 4+2^2=

Video Solution

Step-by-Step Solution

To solve the expression 4+22 4 + 2^2 , follow the order of operations, often remembered by the acronym PEMDAS (Parentheses, Exponents, Multiplication and Division (from left to right), Addition and Subtraction (from left to right)).

Let's break down the expression:

  • Step 1: Identify any exponents.
    The expression contains an exponent: 22 2^2 . To evaluate this, multiply 2 by itself: 2×2 2 \times 2 , which equals 4.
    So, 22=4 2^2 = 4 .
  • Step 2: Perform addition.
    Now, substitute the result back into the original expression:
    4+4 4 + 4 .
    Add these numbers together: 4 + 4 equals 8.

Therefore, the answer to the expression 4+22 4 + 2^2 is 8.

Answer

8

Exercise #7

5+361= 5+\sqrt{36}-1=

Video Solution

Step-by-Step Solution

To solve the expression 5+361= 5+\sqrt{36}-1= , we need to follow the order of operations, often remembered by the acronym PEMDAS (Parentheses, Exponents, Multiplication and Division, Addition and Subtraction).


Here are the steps:


First, calculate the square root:

36=6 \sqrt{36} = 6

Substitute the square root back into the expression:

5+61 5 + 6 - 1

Next, perform the addition and subtraction from left to right:

Add 5 and 6:

5+6=11 5 + 6 = 11

Then subtract 1:

111=10 11 - 1 = 10

Finally, you obtain the solution:

10 10

Answer

10 10

Exercise #8

7+495= 7 + \sqrt{49} - 5 =

Step-by-Step Solution

First, evaluate the square root: 49=7\sqrt{49}=7.

Then, follow the order of operations (PEMDAS/BODMAS):

1. Addition: 7+7=147 + 7 = 14

2. Subtraction: 145=914 - 5 = 9

So, the correct answer is 9 9 .

Answer

9 9

Exercise #9

3×2+81= 3 \times 2 + \sqrt{81} =

Step-by-Step Solution

First, evaluate the square root: 81=9\sqrt{81}=9.

Then, follow the order of operations (PEMDAS/BODMAS):

1. Multiplication: 3×2=63 \times 2 = 6

2. Addition: 6+9=156 + 9 = 15

So, the correct answer is 15 15 .

Answer

15 15

Exercise #10

816×3= 8 - \sqrt{16} \times 3 =

Step-by-Step Solution

First, evaluate the square root: 16=4\sqrt{16}=4.

Then, follow the order of operations (PEMDAS/BODMAS):

1. Multiplication: 4×3=124 \times 3 = 12

2. Subtraction: 812=48 - 12 = -4

So, the correct answer is 4 -4 .

Answer

4 -4

Exercise #11

1052:5= 10-5^2:5=

Step-by-Step Solution

First, compute the power: 52=25 5^2 = 25 .

Next, divide: 25÷5=5 25 \div 5 = 5 .

Finally, subtract: 105=5 10 - 5 = 5 .

Answer

5 5

Exercise #12

1542:2= 15-4^2:2=

Step-by-Step Solution

First, compute the power: 42=16 4^2 = 16 .

Next, divide: 16÷2=8 16 \div 2 = 8 .

Finally, subtract: 158=7 15 - 8 = 7 .

Answer

7 7

Exercise #13

2033:3= 20-3^3:3=

Step-by-Step Solution

First, compute the power: 33=27 3^3 = 27 .

Next, divide: 27÷3=9 27 \div 3 = 9 .

Finally, subtract: 209=11 20 - 9 = 11 .

Answer

11 11

Exercise #14

8+3×242= 8 + 3 \times 2 - 4^2 =

Step-by-Step Solution

First, follow the order of operations (BODMAS/BIDMAS):

Step 1: Calculate the exponent:
42=164^2 = 16

Step 2: Perform the multiplication:
3×2=63 \times 2 = 6

Step 3: Perform the addition and subtraction from left to right:
8+616=1416=28 + 6 - 16 = 14 - 16 = -2

The correct result is: 2-2.

Answer

2 -2

Exercise #15

63+5×22= 6 - 3 + 5 \times 2^2 =

Step-by-Step Solution

First, follow the order of operations (BODMAS/BIDMAS):

Step 1: Calculate the exponent:
22=42^2 = 4

Step 2: Perform the multiplication:
5×4=205 \times 4 = 20

Step 3: Perform the addition and subtraction from left to right:
63+20=236 - 3 + 20 = 23

The correct result is: 2323.

Answer

23 23

Exercise #16

4+49×3= 4 + \sqrt{49} \times 3 =

Step-by-Step Solution

First, solve the square root: 49=7 \sqrt{49} = 7 .

Next, multiply 7 by 3: 7×3=21 7 \times 3 = 21 .

Finally, add 4 to 21: 4+21=25 4 + 21 = 25 .

Answer

25 25

Exercise #17

5216+2= 5^2 - \sqrt{16} + 2 =

Step-by-Step Solution

Start by calculating the power: 52=25 5^2 = 25 .

Then, calculate the square root: 16=4 \sqrt{16} = 4 .

Subtract 4 from 25: 254=21 25 - 4 = 21 .

Finally, add 2: 21+2=23 21 + 2 = 23 .

Answer

23 23

Exercise #18

0:22×110+3= 0:2^2\times1^{10}+3=

Video Solution

Step-by-Step Solution

To solve the expression, we need to follow the order of operations, often remembered by the acronym PEMDAS, which stands for Parentheses, Exponents, Multiplication and Division (left-to-right), Addition and Subtraction (left-to-right).

  • Step 1: Handle the exponentiation in the expression.
    The exponentiation operation is on the number 2, so we compute 22 2^2 which is equal to 4.
  • Step 2: Handle the multiplication.
    We multiply the result of the exponentiation by the number following it. Therefore, we have 4×110 4 \times 1^{10} . Since 110=1 1^{10} = 1 , the expression becomes 4×1=4 4 \times 1 = 4 .
  • Step 3: Handle the operations on either side of multiplication.
    Before evaluating, it's essential to note that the original expression is slightly misunderstood due to potential formatting errors. Let's assume it was meant to use division as 0÷22 0 \div 2^2 due to the notation 0:22 0:2^2 . Therefore, calculate 0÷4 0 \div 4 which is equal to 0.
  • Step 4: Handle the addition.
    Finally, we add 3 to the result of the division: 0+3=3 0 + 3 = 3 .

Thus, the final answer is 3.

Answer

3

Exercise #19

100:52+32= 100:5^2+3^2=

Video Solution

Step-by-Step Solution

To solve the expression 100:52+32= 100:5^2+3^2= , we need to follow the order of operations, often remembered by the acronym PEMDAS (Parentheses, Exponents, Multiplication and Division (from left to right), Addition and Subtraction (from left to right)). Here, we have division, exponentiation, and addition to work with.

Step 1: Calculate the exponentiation first.

  • Calculate 52 5^2 : 5×5=25 5 \times 5 = 25 .
  • Calculate 32 3^2 : 3×3=9 3 \times 3 = 9 .

So, the expression becomes 100:25+9 100:25+9 .

Step 2: Perform the division next, which comes before addition.

  • Divide 100 100 by 25 25 : 100÷25=4 100 \div 25 = 4 .

Now the expression simplifies to 4+9 4 + 9 .

Step 3: Perform the addition.

  • Add 4 4 and 9 9 : 4+9=13 4 + 9 = 13 .

Therefore, the final result of the expression 100:52+32 100:5^2+3^2 is 13 13 .

Answer

13

Exercise #20

5+552+42= 5+5-5^2+4^2=

Video Solution

Step-by-Step Solution

Let's solve the expression 5+552+42 5+5-5^2+4^2 using the order of operations, also known as BODMAS/BIDMAS (Brackets, Orders (i.e., powers and roots, etc.), Division and Multiplication, Addition and Subtraction).

Here is the step-by-step breakdown:

1. Identify and calculate powers and roots first:
- Calculate 52 5^2 :
52=25 5^2 = 25
- Calculate 42 4^2 :
42=16 4^2 = 16

2. Rewrite the expression using these calculations:
5+525+16 5+5-25+16

3. Perform addition and subtraction from left to right:
- First addition: 5+5=10 5 + 5 = 10
- Subtract the next number: 1025=15 10 - 25 = -15
- Finally add: 15+16=1 -15 + 16 = 1

The final result of the expression 5+552+42 5+5-5^2+4^2 is therefore 1 1 .

Answer

1