Page 15 - Start Up Mathematics_6

Step 3: Now every number with less digits is smaller than every number with more digits.

Therefore, the given numbers in ascending order are as follows:
13,45,678 < 34,52,678 < 43,56,120 < 1,45,62,187 < 2,35,67,890

EXERCISE 1.1
1. Write the numerals for each of the following with commas at correct places:

(a) Ninety-five lakh three hundred twenty-two
(b) Forty crore one thousand thirty

(c) Two billion three hundred sixty-five thousand seven hundred twenty-eight
(d) Two hundred twenty-five million seven hundred sixteen thousand four hundred two
2. Insert commas suitably and write the number names according to Indian system of numeration.
(a) 68754329 (b) 73987021 (c) 93754081 (d) 26000786

3. Insert commas suitably and write the number names according to International system of
numeration.
(a) 98765434 (b) 76382949 (c) 45654670 (d) 14367856792

4. Fill in the blanks.
(a) _________ lakh = 100 million
(b) _________ lakh = 10 crore

(c) 1 billion = _________ million

5. Write the following numbers in expanded form:
(a) 2,43,45,892 (b) 6,78,92,831 (c) 45,73,910 (d) 2,34,56,410
6. Find the difference between the place values of two 7s in the number 2,85,73,89,507.

7. How many seven-digit numbers are there in all?
8. Find the difference between the place value and face value of 8 in 67,85,90,213.

9. Which is smaller—5,67,34,523 or 5,67,35,587?
10. Arrange the following numbers in ascending order:
34,56,678; 78,46,120; 3,49,67,880; 73,62,678 and 8,97,62,187.

11. Arrange the following numbers in descending order:
34,56,658; 78,98,120; 49,67,890; 79,02,678 and 7,97,62,187.

Standard Units of Measurement

A. Length
The standard unit of length is metre. There exist smaller as well as
bigger units of length. Their relation are as follows: Do you know?

1 centimetre (cm) = 10 millimetres (mm) 12 inches = 1 foot (ft)
= 1 yard (yd)
3 feet
1 decimetre (dm) = 10 centimetres (cm) 1 decade = 10 years
10 decades = 1 century

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