Page 49 - Start Up Mathematics_8 (Non CCE)

Fill in the Blanks

n
m
1. (x) = (x) ⇒ __________________
2.  p   − m =    m


 q   
–5
3. The standard form of 21.36 × (10) = __________________
3
4. The usual form of 4.39 × (10) = ______________________
Answer in One Word or a Line

n
1. What is the reciprocal of x ?
m
n
2. What is the reciprocal of x × x ?
5
m
3. If x = x , what is the value of m?
2 3
4. What is (2 ) ?
5. What is  3  5 ÷  3  2 ?
 
 
 4   4 
let’s evaluate
p  4 −4  2  − 5 1
− 
1. Write in the form : (a) (b) (c)
q     4 () − 2
 5
3 


2. Find the value of:
−
   1  − 1  1   − 1

1
–2
2
–2 0
–2
0
–1
(a) {(6) + (2) } × 3 (b) {(2) + (3) + (4) } (c)    −   
   6   5   
3. Simplify:

   1  − 3  1     − 3
3
−
1
–1
–1
0
–3
–1
–3
(a)    −    ÷   (b) {(2) + (3) } × (7) (c) {(1) + (2) + (3) } ÷ (4) –1
   3   2     4 
− 
–1
4. By what number should (2) be multiplied to get the product as  7  −1 ?

 4
5. Express the following as a power with base 2: 
6
–5
–3
(a) (4) (b) (8) (c) (4) (d) (16) 3
6. Write as a rational number with negative exponent: − 2


3
6  
(a)  1  4 (b) (2) 5 (c)      
 
 6     7    −1
2

1
3
3
7. Simplify: (a) {(3) – (2) } ×  2  − 3 (b)        −   −2  
 
 
 3      2    
 
–7
–10
8. Find m if: (a) (3) ÷ (3) = (3) 2m – 1 (b)  −  1  3m ×  −  1  2 =   −  1  m − 6


 4   4   4 
9. Write in standard form:
(a) 0.00000000156 (b) 0.009801 (c) 215.06 × (10) –2
10. Write in usual form:
–7
5
(a) 8.03 × (10) (b) 1.426 × (10) (c) 6 × (10) –5
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