Addition — Formula Sheet
ICSE · Class 3 · Mathematics
5 formulas from Addition (ICSE Class 3 Mathematics) on one page, grouped by topic. Includes Example. Part of the ICSE Class 3 Mathematics syllabus.
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Formulas and Key Relations
Addition Without Carry Over
A + B = Sum (no carry)
Addition With Carry Over
Digit A + Digit B ≥ 10 → Carry 1 to next column
Adding 3-digit and 4-digit Numbers
3-digit + 4-digit = 4-digit (usually)
Adding Three or More Numbers
A + B + C = Total Sum
Addition With Carry Over
Example
8 + 7 = 15 → Write 5, carry over 1 ten.
Full sheet with units and worked examples
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