Page 14 - Start Up Mathematics_4

Example 2: Group the given numbers by putting commas according to the International
Number System. Also, write the number names.

(a) 43825 (b) 619807 (c) 2864317

Solution: (a) 43,825 → It is read as forty-three thousand eight hundred twenty-five.

(b) 619,807 → It is read as six hundred nineteen thousand eight hundred
seven.

(c) 2,864,317 → It is read as two million eight hundred sixty-four thousand
three hundred seventeen.

Let’s determine the place value of the digits of the number 2,864,317.

Periods MILLIONS (M) THOUSANDS (Th) ONES (O)
→
Number Hundred Ten Millions Hundred Ten Thousands Hundreds Tens Ones
Millions Millions Thousands Thousands
(HM) (TM) (M) (HTh) (TTh) (Th) (H) (T) (O)
100,000,000 10,000,000 1,000,000 100,000 10,000 1,000 100 10 1

2,864,317 2 8 6 4 3 1 7

The place value of 2 is 2 millions, i.e., 2,000,000.
The place value of 8 is 8 hundred thousands, i.e., 800,000.

The place value of 6 is 6 ten thousands, i.e., 60,000.

The place value of 4 is 4 thousands, i.e., 4,000.
The place value of 3 is 3 hundreds, i.e., 300.

The place value of 1 is 1 ten, i.e., 10.

The place value of 7 is 7 ones, i.e., 7.

Comparing Indian and International Number Systems

Periods → CRORES (C) LAKHS (L) THOUSANDS (Th) ONES (O)

Place Value Ten Crores Ten Lakhs Ten Thousands Hundreds Tens Ones
→ Crores Lakhs Thousands
10,00,00,000 1,00,00,000 10,00,000 1,00,000 10,000 1,000 100 10 1

Periods → MILLIONS (M) THOUSANDS (Th) ONES (O)
Place Hundred Ten Millions Hundred Ten Thousands Hundreds Tens Ones
Value → Millions Millions Thousands Thousands
100,000,000 10,000,000 1,000,000 100,000 10,000 1,000 100 10 1

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