Karteikarten
Solving simple equations
Karten in diesem Stapel (7)
- 1Group letters on one side and numbers on the other Careful: when moving numbers from one side of an equ1ation to the other, the sign changes from positive (+) to negative (-) or vice versa2x - 1 = 5
move the (-1) to the right hand side
It becomes a +1
so: 2x = 5+1 = 6
x = 6/2 = 3 - 24 = 6x - 8 move the -8 to the left side but it becomes a +8 so: 4+8 = 6x 12 = 6x x = 12/6 = 2x/3 + 1 = 4
move +1 to right but becomes - 3
x/3 = 4-1
x/3 = 3
Divide by 3 becomes multiply by 3
x = 3x3 = 9 - 3How do you know what order to perform steps in an equation?Brackets
pOwers
Division
Multiplication
Addition
Subtraction - 43(y+1) First, expand the BRACKETS 3 x y + 3 x 1 3y + 3 Second, do SUBTRACTION (not forgetting that signs change) 3y = -3 y= -16(a+b)
BRACKETS first
6 x a + 6 x b
6a + 6b - 5REMEMBER When expanding brackets - X - = + - X + = --2(x + y) = -2x -2y
-5(2d-4e) = -10d + 2e
-(2a + 4b) = -2a - 4b
- (3x - 2) = -3x + 2 - 6REMEMBER put letters in alphabetical orderREMEMBER
Group like terms
e.g. 4a + 2b +3a + 5b = 7a + 7b - 7DON'T FORGET SQUARE/CUBED ROOTSe.g. a x a x a x a = a4
2g x 3g x 2g = 12g3
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- Maths Karteikarten am Solving simple equations, erstellt von ella rose am 18/05/2015.
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- ella rose
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