Chapter 6 · Class 1 CBSE · Formula Sheet

Numbers 21 to 100 Formulas — Class 1 CBSE

Read, write and order numbers up to 100. Skip counting by 2s, 5s, and 10s.

Detailed formula cards for Numbers 21 to 100 are being prepared. Meanwhile, practice questions to master this topic.

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Worked Examples

1Using: Place Value

Find the place value of 6 in 3,65,421.

Step 1: 6 is in the ten-thousands place.

Step 2: Place value = 6 x 10,000 = 60,000.

Answer: 60,000

2Using: Successor

Find the successor of 9,999.

Step 1: Successor = n + 1

Step 2: = 9,999 + 1 = 10,000.

Answer: 10,000

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More Class 1 CBSE Formulas

Numbers 1 to 9Addition within 9Subtraction within 9Numbers 10 to 20Addition & Subtraction within 20Shapes & Space

Frequently Asked Questions

How many formulas are in Class 1 CBSE Numbers 21 to 100?+
There are several key formulas in the Numbers 21 to 100 chapter for Class 1 CBSE. Each formula is essential for solving problems in this topic.
How to remember Numbers 21 to 100 formulas easily?+
Practice regularly with worked examples, group related formulas together, and use SparkEd's interactive practice mode to reinforce your memory through problem-solving.
Are these Numbers 21 to 100 formulas enough for exams?+
Yes, these formulas cover the complete CBSE Class 1 syllabus for Numbers 21 to 100. Practice applying them to different types of questions for full exam readiness.

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SparkEd Maths provides free formula sheets for Class 1-10 across 7 education boards. All formulas are aligned to the 2025-26 syllabus.