Maths - formulae

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How do you multiply fractions
if 6/4=3/X
multiply diagonally
6X=3x4
6X=12
X=2
1 of 5
Moving over the equals sign
When you move a number or letter over the equals sign the sign changes.

example X+6=10
becomes X=10-6
X=4
2 of 5
Multiplying signs
-x-=+
+x+=+
+x-=-
-x+=-
3 of 5
What is the mean
Sum of value in a dataset
Mean =-------------------------------
Number of values
4 of 5
efe
efef
5 of 5

Other cards in this set

Card 2

Front

Moving over the equals sign

Back

When you move a number or letter over the equals sign the sign changes.

example X+6=10
becomes X=10-6
X=4

Card 3

Front

Multiplying signs

Back

Preview of the front of card 3

Card 4

Front

What is the mean

Back

Preview of the front of card 4

Card 5

Front

efe

Back

Preview of the front of card 5

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