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Standard Notation and Expansion of Numbers

Express the f...

Question

Express the following numbers in standard form:
(i) 5, 00, 00, 000 (ii) 70, 00, 000
(iii) 3, 18, 65, 00, 000 (iv) 3, 90, 878
(v) 39087.8 (vi) 3908.78

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Solution

(i) 50000000 = 5 × 10⁷
(ii) 7000000 = 7 × 10⁶
(iii) 3186500000 = 3.1865 × 10⁹
(iv) 390878 = 3.90878 × 10⁵
(v) 39087.8 = 3.90878 × 10⁴
(vi) 3908.78 = 3.90878 × 10³

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100 %

Which of the following are rational numbers?
(i) $\frac{5}{- 8}$

(ii) $\frac{- 6}{11}$

(iii) $\frac{7}{15}$

(iv) $\frac{- 8}{- 12}$

(v) $6$

(vi) $- 3$

(vii) $0$

(viii) $\frac{0}{1}$

(ix) $\frac{1}{0}$

(x) $\frac{0}{0}$

6 : 00

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9 : 00

9 : 00

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3 : 00

3 : 00

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5 : 00

5 : 00

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9 : 00

9 : 00

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6 : 00

		₹
(i)	Mohan commenced business with cash	50,000
(ii)	Purchased goods for cash	30,000
(iii)	Purchased goods on credit	20,000
(iv)	Sold goods (costing ₹ 10,000) for	12,000
(v)	Bought furniture on credit	2,000
(vi) (vii)	Paid cash to a creditor Salary paid	15,000 1,000

Time (in hours):	7:00	9:00	11:00	13:00	15:00	17:00	19:00	21:00
Temperature (°F) in:	100	101	104	102	100	99	100	98

Time (in hours):	8:00	10:00	12:00	14:00	16:00	18:00	20:00
Temperature (°F) in:	100	101	104	103	99	98	100

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