Indian Number System — Formula Sheet
ICSE · Class 5 · Mathematics
6 formulas from Indian Number System (ICSE Class 5 Mathematics) on one page, grouped by topic. Part of the ICSE Class 5 Mathematics syllabus.
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Formulas and Key Relations
Successor and Predecessor
Successor = Number + 1
Predecessor = Number - 1
Understanding Large Numbers
10 ten lakhs = 1 crore = 1,00,00,000
Successor and Predecessor
For large numbers, adding or subtracting 1 may change multiple digits (e.g., 9,99,99,999 + 1 = 10,00,00,000).
10 crores = 10,00,00,000 (9 digits)
100 crores = 100,00,00,000 (10 digits)
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