CSEC COMPUTATION 2

The number 8.15072 written correct to 3 decimal places is

• 8.150

• 8.151

• 8.157

• 8.160

In scientific notation, 190.57 is written as

• 0.19057 x 10³

• 1.9057 x 10²

• 19.057 x 10¹

• 1.9057 x 10^-1

If $780 is shared 2:3:5, then the difference between the largest share and the smallest share is

• $390

• $234

• $156

• $78

If 60% of a number of beads is 180, what is 150% of a number of beads?

• 675

• 450

• 270

• 72

12.7  $\div$  0.01 is equal to

• 1.27

• 127

• 1270

• 12270

The exact value of  $\frac{34.85\div1.7}{1000}$  is

• 0.205

• 0.0205

• 0.00205

• 0.000205

 $\left(-\frac{1}{5}\right)^3$  is the same as

•  $-\frac{1}{15}$  

•  $-\frac{1}{125}$  

•  $\frac{1}{15}$  

•  $\frac{1}{125}$  

(-2)² + (-4)² =

• -12

• -20

• 12

• 20

What number must be added to  $1\frac{2}{5}$  to give 2?

•  $\frac{4}{5}$  

•  $\frac{3}{5}$  

•  $\frac{2}{5}$  

•  $\frac{1}{5}$  

Express  $7\ \frac{3}{8}$  as a decimal correct to 3 significant figures.

• 7.30

• 7.37

• 7.38

• 7.40