$$\frac{50.5}{0.025\times50}-\frac{8.59-2.14}{1.5}$$  

$$8\frac{2}{5}\times6\frac{17}{21}-8\frac{2}{7}$$  

$$4\frac{3}{8}+7\frac{3}{5}\times7\frac{3}{4}$$  

$$2\frac{1}{8}+\frac{24}{25}\div\frac{9}{10}$$  

$$4\frac{5}{6}-5\frac{1}{4}\div1\frac{1}{2}$$  

$$\frac{5\frac{1}{2}+2\frac{2}{3}}{1\frac{1}{6}}$$  

Write down five thousand five hundred and fifty in numbers.

Arrange the following numbers in order of size starting with the smallest.

$$0.256\ ,\ -\frac{1}{4}\ ,\ -0.2\ ,\ 30\%\ .\ \frac{2}{5}$$  

When it is 14 00 hours in Brisbane, Australia, the time in Bandar Seri Begawan is 12 00 hours.

(i) What is the time in Bandar Seri Begawan when it is 02 00 hours in Brisbane?

(ii) RBA flight 071 departs Bandar Seri Begawan for Brisbane at 15 10 hours. The flying time is 7 hours. What will be the time in Brisbane when the plane arrives?

Convert:

(i) 352 grams in kilograms

(ii) 4 days into minutes

(iii) 4.5 hours to seconds

(iv) 29 hours 57 minutes to minutes

Express 2 hours 43 minutes in seconds.

Convert 525 seconds into minutes and seconds.

Write as a fraction in its lowest terms

(a) 75%

(b) 0.07

The temperature at noon at an Antarctic weather centre was $$-15\degree C$$  . At midnight it had fallen by $$12\degree C$$  .

What was the temperature at midnight?

Martin recorded the outside temperature every three hours. At 07 00 the temperature was $$-2\degree C$$  .

(a) This was $$5\degree C$$ higher than the temperature at 04 00. Write down the temperature at 04 00.

(b) At 10 00 the temperature was $$11\degree C$$  . Write down the increase in temperature between 07 00 and 10 00.