Practice Problems 2 Chapter 1 CHE 151
Graham/08
Exponential Computational Practice. Express answers in correct scientific notation
with the proper number of significant figures
I Add or Subtract
a) 2.80 x 104 + 7.0 x 103 = __________________
b) 8.951 x 10-3 + 3.62 x 10-2 = __________________
c) 7.93 x 10-4 + 0.8751 x 10-3 = __________________
d) 16.5 x 102 - 48.60 x 101 = __________________
e) 4.63 x 102 - 0.001577 x 104 = __________________
f) 2.6 x 10-3 - 0.842 x 10-4 = __________________
II Multiply or Divide
a) (4 x 104) x (2.5 x 103) = __________________
b) (1.8 x 10-4) x (6.208 x 105) = __________________
c) (5.7 x 106) x (1.322 x 10-4) = __________________
d) (3.8 x 103) x (2.654) x (4.97 x 102) x (7.911 x 10-8) = _________
e) (7.2 x 10-4) x (8.711 x 105) = __________________
(6.24 x 10-2)
f) 4.113 x 103 = __________________
(2.0 x 10-6) x (8.975 x 10-5)
g) (3.671 x 105 + 8.92 x 103) x 4.8377 x 10-9 = ________________
6.1 x 10-4 - 3.224 x 10-2