2. Write the following in Scientific notations (a) (0.0012) (b) 321436 © 0. 321 x 0. 123
3. Divide and simplify the following
( a) (0.0032)/ (0.04) (b) ( 2.25 )/ (0.5) ( c ) (0.0013)/ (0.00039)
4. Find the common factor of each of the following expressions.
(a) x^3 + x^2 – x (b) 6 x^4 – 3 x^3 + 12 x^5 ( c ) xyz – x^2 yz + x^2z
5. Solve the following for x
(a) 3x – 5 = -2 (b) -5x = 0.75 ( c ) 3x –4 = 2x +5
6. Change the following decimal numbers into fractions.
(a) 0.12 ( b) 3.15 ( c ) 0.036
7. Change the following fractions into decimal numbers.
(a) 5/6 (b) 11/110 ( c ) 25/125
8. Write the following improper fractions into mixed numbers.
(a) 14/3 (b) 23/4 ( c ) 10/3
9. Determine the additive inverse of each of the following.
(a) -7 (b) ¾ ( c ) a-b
10. Determine the multiplicative inverse of each.
(a) -9 (b) 4/3 ( c ) -a/b
11. Write the following reoccurring decimals to fractions.
(a) 0.111 ( b) 0. 555... ( c ) 0. 121212...
12. Which one of the following is an irrational number?