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What is the Meaning of 'find the value of'?
Grade Level:
Class 5
All STEM domains, Finance, Economics, Data Science, AI, Physics, Chemistry
Definition
What is it?
When you are asked to 'find the value of' something in Maths, it means you need to calculate its exact number or quantity. You will be given some information or an expression, and your job is to figure out what number it represents after doing all the necessary calculations.
Simple Example
Quick Example
Imagine you have 5 rupees and your friend gives you 3 more rupees. If someone asks you to 'find the value of' the total money you have, you would add 5 + 3. The value would be 8 rupees.
Worked Example
Step-by-Step
Let's find the value of (10 + 5) - 3.
1. First, look inside the brackets: (10 + 5).
---2. Add the numbers inside the brackets: 10 + 5 = 15.
---3. Now the expression becomes 15 - 3.
---4. Subtract 3 from 15: 15 - 3 = 12.
---5. So, the value of (10 + 5) - 3 is 12.
Why It Matters
Finding the value of expressions is crucial for solving problems in science, engineering, and even managing your money. Scientists find values to predict weather, engineers calculate values to build safe bridges, and economists find values to understand markets, helping people make smart decisions.
Common Mistakes
MISTAKE: Not following the correct order of operations (like BODMAS/PEMDAS). For example, in 5 + 2 x 3, adding 5+2 first. | CORRECTION: Always do multiplication/division before addition/subtraction, unless brackets tell you otherwise. So, 5 + (2 x 3) = 5 + 6 = 11.
MISTAKE: Making calculation errors with basic addition, subtraction, multiplication, or division. For example, saying 7 x 8 = 54. | CORRECTION: Double-check your basic arithmetic. Practice your tables and sums regularly to avoid simple mistakes.
MISTAKE: Getting confused by negative numbers or decimals when finding values. For example, thinking 5 - 7 is 2. | CORRECTION: Remember rules for positive and negative numbers (e.g., 5 - 7 = -2) and align decimal points carefully for calculations.
Practice Questions
Try It Yourself
QUESTION: Find the value of 15 - 7 + 4. | ANSWER: 12
QUESTION: Find the value of 6 x (9 - 4). | ANSWER: 30
QUESTION: A chaiwala sells 25 cups of chai for Rs. 10 each. If his ingredients cost Rs. 100, find the value of his profit. | ANSWER: Rs. 150
MCQ
Quick Quiz
What does 'find the value of 8 + 4 / 2' mean?
Add 8 and 4, then divide by 2.
Divide 4 by 2, then add 8 to the result.
Multiply 8 by 4, then divide by 2.
Subtract 2 from 4, then add 8.
The Correct Answer Is:
B
According to BODMAS, division comes before addition. So, first calculate 4 / 2 = 2, then add 8 + 2 = 10. Option B follows this correct order.
Real World Connection
In the Real World
When you check your mobile data usage, your phone 'finds the value of' how much data you have left by subtracting your used data from your total data pack. Similarly, when you use a UPI app to pay, it finds the value of your remaining balance after a transaction.
Key Vocabulary
Key Terms
VALUE: The numerical result or amount of something | EXPRESSION: A combination of numbers, variables, and operation symbols (+, -, x, /) | CALCULATE: To determine a value or answer by using mathematics | OPERATION: A mathematical process like addition, subtraction, multiplication, or division | BODMAS: An acronym for the order of operations: Brackets, Orders (powers/roots), Division, Multiplication, Addition, Subtraction.
What's Next
What to Learn Next
Now that you understand 'finding the value of' basic expressions, you can move on to 'Solving Equations'. Solving equations is like finding the value of an unknown number (often called 'x') that makes a mathematical statement true, building directly on what you've learned here.
