Take the square root of 144

Oct 13, 2025 by leolavanderia.com.br 110 views

In today's world, calculators have become an essential tool for mathematical calculations. However, there are times when we need to calculate without using a calculator, such as in exams, quizzes, or when we don't have access to one. In this article, we will show you how to calculate three different mathematical expressions without using a calculator.

2.3.1. Calculate the value of $2.3.2 \cdot 3^0+2^{-1}$

To calculate the value of $2.3.2 \cdot 3^0+2^{-1}$ , we need to follow the order of operations (PEMDAS):

Evaluate the exponent: $3^0 = 1$ (since any number raised to the power of 0 is 1)
Evaluate the fraction: $2^{-1} = \frac{1}{2}$ (since a negative exponent means taking the reciprocal)
Multiply 2.3.2 by 1: $2.3.2 \cdot 1 = 2.3.2$
Add $\frac{1}{2}$ to 2.3.2: $2.3.2 + \frac{1}{2} = 2.3.2 + 0.5 = 2.8.2$

Therefore, the value of $2.3.2 \cdot 3^0+2^{-1}$ is 2.8.2.

2.3.2. Calculate the value of $\left(\frac{5}{2}\right)^5 \times 4^5$

To calculate the value of $\left(\frac{5}{2}\right)^5 \times 4^5$ , we need to follow the order of operations (PEMDAS):

Evaluate the exponent: $\left(\frac{5}{2}\right)^5 = \frac{5^5}{2^5} = \frac{3125}{32}$
Evaluate the exponent: $4^5 = 1024$
Multiply $\frac{3125}{32}$ by 1024: $\frac{3125}{32} \times 1024 = \frac{3125 \times 1024}{32} = \frac{3200000}{32} = 100000$

Therefore, the value of $\left(\frac{5}{2}\right)^5 \times 4^5$ is 100000.

2.3.3. Calculate the value of $\sqrt{10^2+11 \times 4}$

To calculate the value of $\sqrt{10^2+11 \times 4}$ , we need to follow the order of operations (PEMDAS):

Evaluate the exponent: $10^2 = 100$
Multiply 11 by 4: $11 \times 4 = 44$
Add 100 and 44: $100 + 44 = 144$
Take the square root of 144: $\sqrt{144} = 12$

Therefore, the value of $\sqrt{10^2+11 \times 4}$ is 12.

Conclusion

Calculating without a calculator requires following the order of operations (PEMDAS) and simplifying expressions step by step. By breaking down complex expressions into smaller parts and evaluating each part separately, we can arrive at the correct answer without using a calculator. In this article, we have shown you how to calculate three different mathematical expressions without using a calculator.

Tips and Tricks

Always follow the order of operations (PEMDAS) when calculating mathematical expressions.
Simplify expressions step by step to avoid errors.
Use mental math techniques, such as multiplying by 10 or 100, to make calculations easier.
Practice, practice, practice! The more you practice calculating without a calculator, the more comfortable you will become with it.

Common Mistakes

Not following the order of operations (PEMDAS) can lead to errors.
Not simplifying expressions step by step can make calculations more difficult.
Not using mental math techniques can make calculations more time-consuming.
Not practicing regularly can make it difficult to calculate without a calculator.

Real-World Applications

Calculating without a calculator is an essential skill in many real-world applications, such as:

Finance: Calculating interest rates, investment returns, and loan payments without a calculator is crucial in finance.
Science: Calculating scientific formulas, such as the area of a circle or the volume of a sphere, without a calculator is essential in science.
Engineering: Calculating engineering formulas, such as the stress on a beam or the pressure on a pipe, without a calculator is critical in engineering.
Mathematics: Calculating mathematical expressions, such as the value of a trigonometric function or the solution to a differential equation, without a calculator is fundamental in mathematics.

Conclusion

In our previous article, we showed you how to calculate three different mathematical expressions without using a calculator. However, we know that you may still have some questions about calculating without a calculator. In this article, we will answer some of the most frequently asked questions about calculating without a calculator.

Q: What is the order of operations (PEMDAS)?

A: The order of operations (PEMDAS) is a set of rules that tells us which operations to perform first when we have multiple operations in an expression. PEMDAS stands for:

Parentheses: Evaluate expressions inside parentheses first.
Exponents: Evaluate exponents next (such as 2^3).
Multiplication and Division: Evaluate multiplication and division operations from left to right.
Addition and Subtraction: Finally, evaluate addition and subtraction operations from left to right.

Q: How do I simplify expressions without a calculator?

A: To simplify expressions without a calculator, you need to follow the order of operations (PEMDAS) and break down complex expressions into smaller parts. Here are some tips to help you simplify expressions:

Combine like terms: Combine terms that have the same variable and coefficient.
Simplify fractions: Simplify fractions by dividing the numerator and denominator by their greatest common divisor.
Use mental math techniques: Use mental math techniques, such as multiplying by 10 or 100, to make calculations easier.

Q: How do I calculate exponents without a calculator?

A: To calculate exponents without a calculator, you need to use the exponent rules. Here are some tips to help you calculate exponents:

Use the power rule: The power rule states that (a^m)n = a^(m*n).
Use the product rule: The product rule states that a^m * a^n = a^(m+n).
Use the quotient rule: The quotient rule states that a^m / a^n = a^(m-n).

Q: How do I calculate square roots without a calculator?

A: To calculate square roots without a calculator, you need to use the square root rules. Here are some tips to help you calculate square roots:

Use the square root rule: The square root rule states that √(a^2) = a.
Use the product rule: The product rule states that √(a*b) = √a * √b.
Use the quotient rule: The quotient rule states that √(a/b) = √a / √b.

Q: How do I calculate trigonometric functions without a calculator?

A: To calculate trigonometric functions without a calculator, you need to use the trigonometric identities. Here are some tips to help you calculate trigonometric functions:

Use the sine rule: The sine rule states that sin(a) = opposite side / hypotenuse.
Use the cosine rule: The cosine rule states that cos(a) = adjacent side / hypotenuse.
Use the tangent rule: The tangent rule states that tan(a) = opposite side / adjacent side.

Q: How do I calculate logarithms without a calculator?

A: To calculate logarithms without a calculator, you need to use the logarithmic identities. Here are some tips to help you calculate logarithms:

Use the logarithmic rule: The logarithmic rule states that log(a^b) = b * log(a).
Use the product rule: The product rule states that log(a*b) = log(a) + log(b).
Use the quotient rule: The quotient rule states that log(a/b) = log(a) - log(b).

Conclusion

Calculating without a calculator requires following the order of operations (PEMDAS) and simplifying expressions step by step. By breaking down complex expressions into smaller parts and evaluating each part separately, we can arrive at the correct answer without using a calculator. In this article, we have answered some of the most frequently asked questions about calculating without a calculator. With practice and patience, you can become proficient in calculating without a calculator and apply it to real-world applications.

Tips and Tricks

Practice, practice, practice!: The more you practice calculating without a calculator, the more comfortable you will become with it.
Use mental math techniques: Use mental math techniques, such as multiplying by 10 or 100, to make calculations easier.
Simplify expressions step by step: Break down complex expressions into smaller parts and evaluate each part separately.
Use the order of operations (PEMDAS): Follow the order of operations (PEMDAS) to ensure that you are performing operations in the correct order.

Common Mistakes

Not following the order of operations (PEMDAS): Not following the order of operations (PEMDAS) can lead to errors.
Not simplifying expressions step by step: Not simplifying expressions step by step can make calculations more difficult.
Not using mental math techniques: Not using mental math techniques can make calculations more time-consuming.
Not practicing regularly: Not practicing regularly can make it difficult to calculate without a calculator.