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d. 2637189 6261638 472716 3702928
e. 829417 2039813 1643728 683921 98726

f. 4536201 2738165 402716 1673827 893762
g. 764271 89372 3038374 563728 1263517

h. 3782106 3172638 3827614 3037261 384737
2. Find the greatest and smallest 7-digit numbers with these digits.

a. 4, 7, 2, 1, 9, 8, 3 b. 2, 0, 8, 4, 5, 7, 6
c. 3, 1, 9, 7, 8, 0, 2

International System of Numeration

We start with the first period, named as ones period , consist the first three
digits of the given number. The second period (i.e. thousands period ) is consist of
the next three digits of the given number. The third period (i.e. millions period ),

consist of the three digits of the given number. The fourth period (i.e. billions
period), consist of the next three digits of the given number.

Let's differentiate periods by placing commas in between.

Example 5 : Seprate 457833228 by Comma.

Millions Thousands Ones
(HM) (TM) (M) (HTh) (TTh) (Th) (H) (T) (O)
4 5 7 8 3 3 2 2 8

This number is separated by comma as 457, 833, 228

For example : Write number name according to international system of
numeration.

457833228 — Four hundred fifty seven millions eight hundred thirty three
thousand, two hundred twenty eight.

Place value

Place Value of each digit according to International Place Value System

Let’s take a number 884, 511, 009

Millions Thousands ones
(HM) (TM) (M) (HTh) (TTh) (Th) (H) (T) (O)
8 8 4 5 1 1 0 0 9

8 hundred 8 ten 4 5 1 1 0 0 9
million million million hundred ten thousand hundred ten ones
thousand thousand

800,000,000 80,000,000 4,000,000 500,000 10,000 1,000 000 00 9

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Mathematics In Focus - 5