Mathematics Formulas and PPTx for Class 7

Mathematics is an essential subject that helps students in developing problem-solving and critical thinking skills. Class 7 Mathematics covers several topics, including integers, fractions, decimals, algebraic expressions, equations and inequalities, geometry, and data handling. To excel in this subject, students need to have a deep understanding of the formulas and concepts. Here are some formulas and PPTx for Class 7 Mathematics that can help students in their studies.

Formulas:

1. Integers:
- Addition: a + b = b + a
- Subtraction: a - b ≠ b - a
- Multiplication: a × b = b × a
- Division: a ÷ b ≠ b ÷ a

2. Fractions:
- Addition: a/b + c/d = (ad + bc)/bd
- Subtraction: a/b - c/d = (ad - bc)/bd
- Multiplication: a/b × c/d = ac/bd
- Division: a/b ÷ c/d = ad/bc

3. Decimals:
- Addition: Line up the decimals and add as usual.
- Subtraction: Line up the decimals and subtract as usual.
- Multiplication: Ignore the decimals, multiply the numbers, and count the total number of decimal places.
- Division: Move the decimal point of the divisor to the right until it becomes a whole number. Move the decimal point of the dividend the same number of places to the right. Divide as usual.

4. Algebraic Expressions:
- Addition: Combine like terms.
- Subtraction: Combine like terms.
- Multiplication: Distribute the term to all the terms inside the parenthesis.
- Division: Factor out the common term.

PPTx:

1. Integers:
- Introduction to integers.
- Properties of integers.
- Addition and subtraction of integers.
- Multiplication and division of integers.
- Real-life examples.

2. Fractions:
- Introduction to fractions.
- Types of fractions.
- Simplification of fractions.
- Addition and subtraction of fractions.
- Multiplication and division of fractions.
- Real-life examples.

3. Decimals:
- Introduction to decimals.
- Place value of decimals.
- Addition and subtraction of decimals.
- Multiplication and division of decimals.
- Real-life examples.

4. Algebraic Expressions:
- Introduction to algebraic expressions.
- Variables and constants.
- Addition and subtraction of algebraic expressions.
- Multiplication and division of algebraic expressions.
- Real-life examples.

In conclusion, these formulas and PPTx can help students in understanding and mastering Class 7 Mathematics. Students can use these resources to improve their problem-solving skills, and teachers can use them to enhance their teaching methods.