Page 26 - Math Genius C5

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Mind Map Creative Thinking
math
Large NUMBerS

Reading and Writing Numbers Forming Numbers

Indian Place Value System Forming Numbers without Repetition
C tL L TTh Th H t O Greatest number formed by 2, 4, 5, 7, 8 = 87542
7 4 3 6 7 4 3 2 Smallest number formed by 3, 0, 7, 8, 2 = 20378
It is read as: Seven crore forty-three lakh sixty-seven Forming Numbers with Repetition
thousand four hundred thirty-two. Greatest number Smallest number
International Place Value System Th H t O Th H t O
tM M HTh TTh Th H t O 8 8 5 2 2 2 5 8
5 2 7 4 5 6 5 1
It is read as: Fifty-two million seven hundred forty-five Repeating Writing Repeating Writing the
thousand six hundred fifty-one the biggest the other the smallest other digits
digit digits in digit in ascending
descending order
order
Face Value and Place Value

tL L TTh Th H t O Face Place Rounding off Numbers
2 5 7 5 9 8 5 value value
5 5 × 1 = 5 Rounding off numbers to the nearest 10
8 8 × 10 = 80 9 > 5, round up
9 9 × 100 = 900
5 5 × 1000 = 5000 1 0 1 0 9
7 7 × 10000 = 70000 Remain Replace with 0
5 5 × 100000 = 500000 unchanged Increase by 1 or add 1 to 0,
2 2 × 1000000 = 2000000 that is 0 + 1 = 1
Thus, 10109 is rounded off to the nearest tens as
10110.
Successor and Predecessor

The successor of 7893521 = 7893521 + 1 = 7893522
The predecessor of 7893521 = 7893521 – 1 = 7893520 Rounding off numbers to the nearest 100
8 > 5, round up
9 9 8 8 1
Remain
Comparing and Ordering Large Numbers unchanged Replace with 0
Increase by 1 or add 1 to 8,
C tL L TTh Th H t O that is, 8 + 1 = 9
3 4 5 0 3 4 1 5 Thus, 99881 is rounded off to the nearest
3 4 5 1 2 5 9 0 hundreds as 99900.
Same 0 < 1
34503415 < 34512590

Rounding off numbers to the nearest 1000
6 > 5, round up
7 3 6 6 5 6
Roman Numerals
Remain Replace with 0
unchanged Increase by 1 or add 1 to
Roman Numeral I V X L C D M 6, that is, 6 + 1 = 7
Hindu-Arabic Numeral 1 5 10 50 100 500 1000 Thus, 736656 is rounded off to the nearest
thousands as 737000.

Mathematics-5
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24 Mathematics-5