Exercise 1.1
1. Here are six temperatures, in degree Celsius
6 -10 5 -4 0 2
Write thme in order, starting with the lowest
2. Draw a number line from -6 to 6, write down the integer that is halfway beetween the to numbers in each pair below
a. 1 and 5
b. -5 and -1
c. -1 and 5
d. -5 and 1
3. During the day the temperature in John's greenhouse increases from -4 °C to 5°C
What is the rise in temperature?
4. The temperature this morning was -7°C. This afternoon, the temperature dropped by 12 degrees. What is the new temperature?
5. Heights below sea level can be shown by using negative numbers. What dose it mean to say that the bottom of valley is at -200 metres?
6. Work out the following additions
a. -12+5 c. -19+34-22 e. -15-12+7
b. 4+2-12+5 d. -7+2-8 f. 8+2-4-7+12-24