Integers and cartesian plane revision

Today we went through all the concepts boys need to understand for the test on integers and Cartesian plane. Below is a list of what we discussed to help boys study at home. Due to Chapel running longer than we expected I have said to the boys that we will do our test on Wednesday instead so they have a chance to watch Maths Mansion tomorrow and play battleships as promised.

1. Recognising which number is larger out of positive and negative numbers
*The highest positive number is always the biggest. If there are no positive numbers, the negative number closest to 0 is the biggest.

2. Adding positive and negative numbers.
*Using number lines will help you. Circle the first number and then head in the positive or negative direction based on the second number.

3. Cartesian plane
*Origin in the 0, 0
* with co-ordinates x always comes first because x comes first in the dictionary
*y is the vertical axis because it has a long tail
*draw your own Cartesian plane

4. Worded problems
*Highlight key words/points
*Equation
*Find the answer showing all working out
*Put your answer in a sentence

Maths drills is a great websites to use to help practice for the test. Boys have also been encouraged to bring home their workbooks to practice.
http://www.math-drills.com/integers.shtml


Worded problems to help practice at home:

1.

A diver went 26 meters down. He saw a fish 10 meters above him so he came back up. Then he saw a stingray so he dove a further 7 meters further down. How many meters down is he now?

2.

A building has 20 levels. 4 of those levels are underground. How many levels are there above ground level?

3.

A building has 12 levels, 2 of which are underground.

a)                           If you started on level 8 and went down 10 levels where would you end up?

b)                          If you started on the bottom level and went up 5 levels then down 3 what level are you on?

c)                            Have many levels are above ground?

d)                          Which level would be ground level?

4.

Michael has a temperature of 27 degrees C. Outside the temperature was -4 degrees C. Which is the difference between Michael’s temperature and the temperature outside?