Maths Algebraic Expressions part 10 (Subtraction) CBSE Class 7 Mathematics VII

TL;DR

Learn how to subtract algebraic expressions by rearranging terms and collecting like terms for subtraction.

Transcript

hello friends this video on algebraic expressions part 10 is brought to you by exam for calm no more fear from exam now the way we learned addition of algebraic expressions in a similar way we will now do subtraction with algebraic expressions so the concept here will remain the same so let us take one example so let us take the first example where... Read More

Key Insights

• 🍉 Algebraic expressions can be subtracted by rearranging terms and collecting like terms, similar to addition.
• 🧑‍🏭 Like terms have the same algebraic factor and can be combined for subtraction.
• 🤘 Negative signs outside brackets reverse the signs of the terms inside.

Questions & Answers

Q: How do you subtract algebraic expressions?

To subtract algebraic expressions, you need to rearrange the terms, remove brackets, and collect like terms. Then, simply subtract the numerical coefficients of the like terms.

Q: What are like terms in algebraic expressions?

Like terms are terms that have the same algebraic factor. In subtraction, you only need to subtract the numerical coefficients of these like terms.

Q: What should you do if there is a negative sign outside the bracket in subtraction?

When there is a negative sign outside the bracket, the signs of the terms inside the bracket get reversed. So, you need to change the signs of the numerical coefficients accordingly.

Q: How do you subtract algebraic expressions with multiple variables?

To subtract algebraic expressions with multiple variables, follow the same process of rearranging terms and collecting like terms. Subtract the numerical coefficients for each variable separately.

Summary & Key Takeaways

• Subtraction of algebraic expressions follows the same concept as addition, where you subtract the numerical factors and rearrange terms.

• By rearranging the terms and collecting like terms, you can easily subtract algebraic expressions by finding the difference between their numerical coefficients.

• The process involves removing brackets, rearranging terms, and simplifying by subtracting like terms.