Class II Mathematics
Chapter 1: Numbers up to One Hundred
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Syllabus Sections
Key Formulas & Equations
Click Copy to duplicateExpanded Notation
ab = 10a + b
Expands two-digit number into ten-times tens value plus units.
Related Formulas from Adjacent Chapters
Addition Carrying Rule
10 \text{ Ones} = 1 \text{ Ten}
[From Double Digit Addition] Regroups ten ones into one ten and carries it over.