--DEFINITION--
Inequalities are the relationships between two expressions that are not equal to one another. The symbols used for inequalities are <, >, ≤, ≥ and ≠.
<, 'LESS THAN'
>, 'GREATER THAN'
≤, 'LESS THAN OR EQUAL TO'
≥ 'GREATER THAN OR EQUAL TO'
≠, 'NOT EQUAL TO
--INEQUALITIES ON A NUMBER LINE--
Inequalities can be shown on a number line.
Start at the number stated:
If the number is less than or greater than
Draw an 'OPEN CIRCLE' and add a short arrow in the correct direction
E.g. 'x > -3'
E.g. 'x < 3'
If the number is less than or equal to and greater than or equal to
Draw an 'CLOSED CIRCLE' and add a short arrow in the correct direction
E.g. 'X ≥ -2'
E.g. 'X ≤ 4'
If the number is between two numbers, it's a 'DOUBLE INEQUALITY'
E.g. '-2 ≥ X < 3'
--TASK TIME--
"Next year you will be starting your IGCSE. Any idea what % you need to get an A*, A, B, and C in your favourite subject?" "Click on this LINK and find your favourite subject, then a paper option and its grade threshold. Finally, turn them into inequalities in ranges like these:
E.G. IGCSE Econ, option 'P1' has the following grade inequalities:
78/90 = ('78 ≥ A* ≤ 90')
69/90 = ('69 ≥ A ≤ 77')
60/90 = ('60 ≥ B ≤ 78')
51/90 = ('51 ≥ C ≤ 59')
Once you have done this screenshot and add to this padlet.
--WORKSHEETS--