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# multiplying fractions

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by

## Olivia Sakowicz

on 14 December 2013

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#### Transcript of multiplying fractions

multiplying fractions
STEP 1
MULTIPLY THE NUMERATORS
2
---
3
*
4
---
5
=
2*4=8
8
STEP 2
multiply the denominators
2
---
3
*
4
---
5
=
3*5=15
15
STEP 3
SIMPLIFY IF NEEDED

2
---
3
*
4
---
5
=
8
---
15
DOES NOT NEED
SIMPLIFY
MULTIPLY FRACTIONS
MULTIPLY MIXED NUMBERS
STEP 1
1
5
---
6
*
3
---
3
=
convert the mixed numbers into improper fractions
11
---
6
*
STEP TWO
10
---
multiply the
fractions like before
then convert into mixed number and simplify if needed
STEP 3
multiply a mixed number by
a fraction
STEP 2
STEP 1
STEP 3
11
---
6
*
10
---
3
110
---
110
----
=
18
1
3
18
examples
3
---
6
*
7
---
8
=
21
---
48
21
---
48
3

3
7
---
16
=
-----------------------------------------------------------
1
---
6
*
5
---
7
=
5
---
42
------------------------------------------------------
6
2
---
18
=
6
1
---
9
examples
3
5
---
6
23
----
6
*
2
2
---
3
*
8
---
3
=
184
------
18
184
------
18
=
10
4
---
18
2
=
10
2
---
9
turn the mixed number into an improper fraction.
2
6
---
7
=
20
---
7
2
---
4
2
---
4
=
multiply like normal
20
---
7
2
---
4
*
=
40
----
28
4
=
40
----
28
then simplify
10
---
7
multiply three fractions
STEP 1
multiply the numerators and the denominators
2
---
4
*
*
4
---
5
step 2
6
---
9
=
48
----
180
24
----
90
48
----
180
48
----
180
2
=
*
*
examples
multiply a whole number by a fraction
step 1
11
3
---
5
*
add a one to the whole number as the denominator
---
1
=
step 2
multiply like normal
(numerator*numerator)
(denominator * denominator
11
----
1
*
3
---
5
=
33
----
5
step 3
turn into mixed number and simplify
33
----
5
=
6
3
---
5
does not need simplify
3
---
6
*
2
---
7
*
5
---
6
=
30
----
252
30
----
252
=
15
----
126
multiply a whole number by a mixed number
step 1
turn them both into fractions
(add a one to the whole number and turn the mixed number into a improper fraction.
1
3
---
4
2
=
step 2
multiply the numerators and the denominators
2
---
1
=
7
---
4
2
---
1
*
7
---
4
14
----
4
step 3
turn into a mixed number and simplify if needed
14
----
4
=
3
2
---
4
=
3
1
---
2
=
/
1 and 3/7
/ 2
12
__
45
/
/ 3
4
__
15
/
/
/
x
Full transcript