Class II Mathematics
Chapter 2: Double Digit Addition
Standard NCERT & CBSE aligned study curriculum. Master concepts, track accuracy, revise weak areas, and challenge yourself with 9 customized practice modes.
Class Syllabus Selection
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Syllabus Sections
Key Formulas & Equations
Click Copy to duplicateAddition Carrying Rule
10 \text{ Ones} = 1 \text{ Ten}
Regroups ten ones into one ten and carries it over.
Related Formulas from Adjacent Chapters
Expanded Notation
ab = 10a + b
[From Numbers up to One Hundred] Expands two-digit number into ten-times tens value plus units.
Borrowing Rule
1 \text{ Ten} = 10 \text{ Ones}
[From Double Digit Subtraction] Borrows one ten from tens place to add ten ones to units place.