Chapter 4 · Class 1 CBSE · Formula Sheet

Numbers 10 to 20 Formulas — Class 1 CBSE

Understand teen numbers, place value of tens and ones.

Detailed formula cards for Numbers 10 to 20 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 9Addition & Subtraction within 20Numbers 21 to 100Shapes & Space

Frequently Asked Questions

How many formulas are in Class 1 CBSE Numbers 10 to 20?+
There are several key formulas in the Numbers 10 to 20 chapter for Class 1 CBSE. Each formula is essential for solving problems in this topic.
How to remember Numbers 10 to 20 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 10 to 20 formulas enough for exams?+
Yes, these formulas cover the complete CBSE Class 1 syllabus for Numbers 10 to 20. 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.