Page 29 - Concepts of Reasoning-8

Worksheet-2.2

Miscellaneous

1. State True (T) or False (F) :
–4
–3
a. (2 ÷2 )= 2
b. (–12345) –234 is a negative number.
c. 0.0065 = 65 × 10 –4

–3 –2
d. [(4) ] =4 –5
e. 0.000023=0.23×10 –3

2. Match the following :
a. 0.000075 ( ) i. 7.5 × 10 –5

b. 0.0075 ( ) ii. 7.5 × 10 –8
c. 0.75 ( ) iii. 7.5 × 10 –5

d. 0.000000075 ( ) iv. 7.5 × 10 –6

e. 0.0000075 ( ) v. 75× 10 –2
3. Answer the following :

1
a. Write in exponential form with negative exponents.
784
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b. Expand 891.034 using exponents.

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c. Express 0.0000042 in scientific notation.

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a a 3 –4
d. What is the value of ?
–3
b b
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–5 –2
–1 6
(3 a b )
e. Simplify
2
–8 2 2
(6a b c )
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29 Reasoning - 8