Examples with solutions for Powers and Roots: Solving the problem

Exercise #1

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 #2

53:52×23= 5^3:5^2\times2^3=

Video Solution

Step-by-Step Solution

In the first stage, let's calculate the powers of each of the terms:

53=5×5×5=25×5=125 5^3=5\times5\times5=25\times5=125

52=5×5=25 5^2=5\times5=25

23=2×2×2=4×2=8 2^3=2\times2\times2=4\times2=8

Now let's write the resulting expression:

125:25×8= 125:25\times8=

Since the only operations in the expression are multiplication and division, we will solve the expression from left to right

In other words, we will divide first and then multiply:

125:25=5 125:25=5

5×8=40 5\times8=40

Answer

40

Exercise #3

(380.2512)211= (\sqrt{380.25}-\frac{1}{2})^2-11=

Video Solution

Step-by-Step Solution

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

(380.2512)=(19.512)=(19) (\sqrt{380.25}-\frac{1}{2})=(19.5-\frac{1}{2})=(19)

In the next step, we'll solve the exponentiation, and finally subtract:

(19)211=(19×19)11=36111=350 (19)^2-11=(19\times19)-11=361-11=350

Answer

350

Exercise #4

4+22= 4+2^2=

Video Solution

Answer

8

Exercise #5

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

Video Solution

Answer

10

Exercise #6

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

Video Solution

Answer

31

Exercise #7

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

Video Solution

Answer

1

Exercise #8

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

Video Solution

Answer

5 5

Exercise #9

0:22×110+3= 0:2^2\times1^{10}+3=

Video Solution

Answer

3

Exercise #10

(2+1×2)2= (2+1\times2)^2=

Video Solution

Answer

16

Exercise #11

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

Video Solution

Answer

1

Exercise #12

2×(36+9)= 2\times(\sqrt{36}+9)=

Video Solution

Answer

30

Exercise #13

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

Video Solution

Answer

10 10

Exercise #14

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

Video Solution

Answer

13

Exercise #15

(42+3)×9= (4^2+3)\times\sqrt{9}=

Video Solution

Answer

57

Exercise #16

(203×22)2= (20-3\times2^2)^2=

Video Solution

Answer

64

Exercise #17

182(100+9)= 18^2-(100+\sqrt{9})=

Video Solution

Answer

221

Exercise #18

81+81+10= 81+\sqrt{81}+10=

Video Solution

Answer

100 100

Exercise #19

143121+18= 143-\sqrt{121}+18=

Video Solution

Answer

150 150

Exercise #20

(3+1)2(4+1)= (3+1)^2-(4+1)=

Video Solution

Answer

11