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Math > Fractions And Decimals > Flashcards

Fractions And Decimals Flashcards

1
Q

What are the 5 meanings of fractions?

A

1) proportion of a unit
2) point on a number line
3) proportion of a set
4) representing a division
5) representing a ratio

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2
Q

What is a rational number?

A

Numbers that can be written as fractions

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3
Q

What is an irrational number?

A

A number that cannot be written as a fraction

  • pi
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4
Q

What equivalent fractions?

A

When they represent the same number or quality

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5
Q

What is a percentage

A

A type of ratio used to make comparisons

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6
Q

What is a viniculum?

A

Line that represents division in a fraction

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7
Q

What are like fractions?

A

Fractions with the same denominators

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8
Q

What is the most common method for comparisons

A

Percentage

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9
Q

What are the three meanings of fractions?

A

1) part whole
2) quotient
3) ratio

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10
Q

What is the part-whole meaning of fractions?

A

Fraction represents part of the whole

Eg 3/5

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11
Q

What is the quotient meaning of fractions?

A

Where a quantity is being shared or divided

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12
Q

What is the ratio meaning of fractions

A

Where a set is composed of two or more component parts

Eg class has 3 boys 5 girls

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13
Q

What is a mixed number?

A

Numbers that consist of a whole number part and a fractional part

Eg 2 1/5

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14
Q

What is an improper fraction?

A

Fractions where the numerator is larger than the denominator

Eg 9/4

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15
Q

How do you convert a mixed fraction into an improper fraction?

A

Multiple the whole number by the denominator and then add the numerator. Place the answer over the original denominator

Eg 2 1/3 = 2x3=6+1=7

= 7/3

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16
Q

How do you convert an improper fraction to a mixed fraction?

A

Divide the numerator by the denominator. Whole number is the new whole number and remainder is the numerator

9/5 = 1.8 = 1 8/5

17
Q

Unlike fractions must be written with what before they can be added or subtracted?

A

Common denominator

18
Q

Mixed fractions must be converted to what before they can be multiplied?

A

Improper fractions

19
Q

What underpins the fraction concept?

A

Objects and collections can be partitioned

20
Q

What is a ratio?

A

A set of numbers, separated by colons, written in a certain order to describe the relationship between two or more groups

21
Q

A ratio can only be directly converted to a fraction when?

A

Two numbers are related in a part to whole relationship

22
Q

If it is a comparative part to part relationship then?

A

The first part can be considered a fraction of the second part

Math (7 decks)

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