4th Grade My Math Chapter 8

Fraction Vocabulary

100

What is a fraction?

Pieces or parts of a whole

200

Where does the numerator go and what does it tell you?

It tells you how many pieces you have, and it goes on top.

300

What does the denominator tell you and where does it go in the fraction?

1.) How many pieces there are in a whole 2.) How many times you've split the whole or 3.) What type of fractional piece you have It goes on the bottom.

400

What is a least common multiple?

The lowest multiple that two numbers have in common. Exp. 4, 6 4: 4, 8, 12, 16, 24, 6: 6, 12, 18, 24, 30 The least common multiple is 12.

500

What is a greatest common factor? (write an example)

The highest factor that two numbers have in common. Exp. 4 and 10 4:1, 2, 4 10:1, 10, 2, 5 2 is the greatest common factor

Factors and Multiples

100

What are the factors of the number 12?

1, 2, 3, 4, 6, 12

200

What are the first five multiples of 6?

0, 6, 12, 18, 24, 30

300

Is 69 prime or composite? Why?

Composite because it has more than one factor pair. 69: 1, 69, 3, 23

400

Is 11 prime or composite? How do you know?

It is prime. It only has one factor pair-- 1, 11.

500

Which number is a multiple of 3? 46, 54, 65, 73, 82

54 3 x 18 = 54 (Trick 5+4=9, 9 is a multiple, so 54 is a multiple)

Equivalent Fractions

100

What are two fractions that are equivalent to 1/2?

Answers may vary. 2/4, 3/6, 4/8, 5/10, etc.

200

1/3 = ?/6

2/6

300

1/4 = ?/12

3/12

400

2/3 = 6/?

6/9

500

3/4 = 12/?

12/16

Simplest Form

100

Write the following fraction in simplest form:

3/12

1/4

200

Write the following fraction in simplest form:

8/10

4/5

300

Write the following fraction in simplest form:

18/24

3/4

400

What is 40/100 in simplest form?

40/100=2/5 40: 1, 40, 2, 20, 4, 10 100: 1, 100, 2, 50, 4, 25, 5, 20, 10 The greatest common factor is 20.

500

Write the following fraction in simplest form:

56/1000

7/125

Comparing Fractions

100

Use <, > or = to compare the fractions:

1/4 and 5/6.

1/4 < 5/6

200

Write these fractions in order from least to greatest: 1/7, 1/10, 1/3, 1/2.

1/10, 1/7, 1/3, 1/2

300

3/6 __ 5/10 <, >, or =

3/6 = 5/10 They are both equivalent to 1/2.

400

2/3 __ 4/10 <, >, or =

2/3 > 4/10

500

Write these fractions in order from least to greatest: 11/12, 9/10, 4/5, 5/6

4/5, 5/6, 9/10, 11/12

Mixed and Improper Fractions

100

Use a diagram to draw out 1 and 3/4

See pictures.

200

What is 3 3/4 as an improper fraction?

15/4

300

What is 17/3 as a mixed number?

5 2/3

400

Use a diagram to draw out 4 and 5/6

See pictures.

500

What is 31/10 as a mixed number?

3 1/10