Important Topics in Mathematics for CBSE Class 5:

1. Number System:
- Place value and face value of numbers
- Comparing and ordering numbers
- Reading and writing numbers in words
- Roman numerals
- Addition and subtraction of large numbers
- Multiplication and division of small numbers

2. Basic Operations:
- Addition and subtraction of 2-digit numbers with and without carryover
- Multiplication tables up to 20
- Division with remainders
- Mental calculations
- Word problems involving basic operations

3. Fractions and Decimals:
- Introduction to fractions and their representation
- Equivalent fractions
- Proper and improper fractions
- Addition and subtraction of fractions
- Introduction to decimals and their representation
- Conversion between fractions and decimals

4. Measurement:
- Length, weight, and capacity
- Standard units of measurement (meter, kilogram, liter)
- Conversion between different units
- Estimation and approximation
- Perimeter and area of simple shapes

5. Geometry:
- Lines, line segments, and rays
- Types of angles (right, acute, obtuse)
- Parallel and perpendicular lines
- Properties of triangles and quadrilaterals
- Symmetry and patterns

6. Data Handling:
- Collection, organization, and representation of data
- Bar graphs and pictographs
- Interpretation and analysis of data
- Probability and likelihood

7. Money and Time:
- Currency denominations and their values
- Addition and subtraction of money
- Conversion between different units of time (seconds, minutes, hours)
- Reading and interpreting time on analog and digital clocks

8. Patterns and Algebra:
- Number patterns and sequences
- Identifying and extending patterns
- Simple algebraic expressions
- Solving equations with one variable

9. Mental Ability:
- Logical reasoning and problem-solving skills
- Critical thinking and analytical skills
- Mental calculations and quick estimation
- Visualization and spatial reasoning

10. Revision and Practice:
- Regular revision of concepts and topics
- Solving practice questions and worksheets
- Participating in group discussions and quizzes
- Seeking help and clarification when needed

By focusing on these important topics, students will develop a strong foundation in mathematics and be well-prepared for higher classes. Regular practice and revision are key to mastering the subject.