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Maths > Unit 4 - FractionS > Flashcards

Unit 4 - FractionS Flashcards

1
Q

What is another word for cancelling down?

A

Simplifying

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2
Q

How do your simplify a fraction?

A

Find the highest common multiplier.

Divide top and bottom by that number.

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3
Q

How do you change a mixed number to a fraction?

A

Mixed number x bottom.

Product + top.

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4
Q

How do you multiply two fractions together?

A

Multiply tops

Multiply bottoms.

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5
Q

How do you divide two fractions?

A

Second fraction upside down.

Multiply across.

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6
Q

How do you add two fractions together?

A

Multiply bottoms.
Cross cross
Add tops.

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7
Q

How do you subtract to fractions?

A

Multiply bottoms.
Cross cross
Take away tops.

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8
Q

How do find the fraction of something?

A

Multiply number by top.

Divide number by bottoms.

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9
Q

How do you write a ratio as a fraction?

A

Just have the divide sign to a colon.

2/9 = 2:9

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10
Q

How do you simplify ratios?

A

Divide them both by the same number.

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11
Q

How do you work with ratios of different units?

A

Multiply or divide until they have the same units.

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12
Q

How do you get the ratio into 1:n or n:1?

A

Divide left to right or right to left.

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13
Q

What is direct proportion?

A

When one number is multiplied, Theo there is multiplied by the same number.

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14
Q

How do you find the ratio of something?

A

Add ratios.
Divide whole number by ratio total.
Multiply this by each value.
Add to check.

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15
Q

How do you find x% of y?

A

Number x percentage over 100.

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16
Q

How do you increase by an amount?

A

Multiply by 1 + percentage.

(90% = 1.90).

17
Q

How do decrease by an amount?

A

Multiply by 100 - percentage in a decimal.

( 90% = 0.10 ).

18
Q

How do you express x as a percentage of y?

A

Divide x by y then multiply by 100.

19
Q

How do you find the percentage change?

A

CHANGE divided by original x 100.

20
Q

How do you find the original value?

PAGE 65

A
  1. Write amount as a percentage of the original value.
  2. Divide to find 1%.
  3. Multiply by 100.
21
Q

How do you go from a percentage to a fraction?

A

Percentage over 100.

Simplify.

22
Q

How do you get a fraction to a percentage?

A

Convert fraction to over 100.
OR
Numerator divided by denominator x 100.

23
Q

How do go from percentage to a decimal?

A

Divide by 100.

24
Q

How do you get a decimal to a percentage?

A

X 100.

25
Q

How do you get a decimal to a fraction?

A

Put decimal over 100.

Simplify down.

26
Q

How do you get a fraction to a decimal?

A

Denominator to 10, 100 or 100.

OR

NUMERATOR DIVIDE BY DENOMINATOR.

27
Q

How do you convert recurring decimal to a fraction?

A
  1. Multiply by either 10, 100 or 1000.
  2. New decimal take old decimal.
  3. Take one from multiplier.
  4. Divide new number by remaining multiplier.

Maths (11 decks)

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