Flashcards in Fractions Deck (11):

1

## Fast fraction shortcut

### Cross multiply and add (or subtract) the products. Then place the sum (or difference) over the product of the denominators

2

## Key to multiplying fractions

### Break them down

3

## Dividing fractions

### Flip the second fraction, BREAK DOWN NUMBERS, and then multiply

4

## Complex numerator shortcut

###
Numerator of a complex fraction contains addition or subtraction, the fraction can be split as follows

(1+2)/6 --> 1/6 + 2/6 -->3/6 -->1/2

5

## Reciprocal

###
Any two numbers whose products equals +1.

Some may not look like reciprocal such (1/sq.rt.3 * 3/sq.rt.3 = 3/3=1)

Some have more than one reciprocal (1/sq.rt.3 * sq.rt.3/1 = 1)

6

## To compare fractions

### Multiply from the bottom up (cross -multiply) and write the product over the corresponding numerator.

7

## Positive integer X a proper fraction

###
...makes the value smaller

10 * (1/2) = 5

8

## Dividing a positive value by a proper fraction...

###
...makes the value bigger

10 / (1/2) = 20

9

## Squaring a proper fraction...

###
...makes the fraction smaller

(1/2)^2 = (1/4)

10

## Taking the square root of a proper fraction...

###
...makes the fraction bigger

Square root of (1/2) = 0.71

11