dividing fractions notice anything interesting?. dividing by a fraction is the same as multiplying...
TRANSCRIPT
Dividing Fractions
428 421
8
236 231
6
41
221
41
21
21
412
8
213
6
41
12
21
Notice anything interesting
Dividing by a fraction is the same asmultiplying by
the second number ldquoflipped overrdquo
23
32and hellipfor example are
called reciprocals
Write ldquoreciprocalrdquo in your notes
What happens when you multiply a number by its
reciprocal
5
66
5 = 1
Dividing is the same as MULTIPLYING BY THE
RECIPROCALexamples 1
443
41
43
412
3
61
85
685
485
Write this in your notes
How about mixed numbers
helliphint remember what we did with mixed numbers and multiplication
To divide mixed numbersjust change them to
improper fractions then use the rule
32
443
76
321
214
913
322
Practice by doing these
Some of you might not be convinced why this works
Letrsquos look at
43
76
which we can write ashellip
4376
=2124
multiply the top and bottom byhellip
- Dividing Fractions
- Slide 2
- Slide 3
- Slide 4
- Slide 5
- Slide 6
- Slide 7
-
Dividing by a fraction is the same asmultiplying by
the second number ldquoflipped overrdquo
23
32and hellipfor example are
called reciprocals
Write ldquoreciprocalrdquo in your notes
What happens when you multiply a number by its
reciprocal
5
66
5 = 1
Dividing is the same as MULTIPLYING BY THE
RECIPROCALexamples 1
443
41
43
412
3
61
85
685
485
Write this in your notes
How about mixed numbers
helliphint remember what we did with mixed numbers and multiplication
To divide mixed numbersjust change them to
improper fractions then use the rule
32
443
76
321
214
913
322
Practice by doing these
Some of you might not be convinced why this works
Letrsquos look at
43
76
which we can write ashellip
4376
=2124
multiply the top and bottom byhellip
- Dividing Fractions
- Slide 2
- Slide 3
- Slide 4
- Slide 5
- Slide 6
- Slide 7
-
Write ldquoreciprocalrdquo in your notes
What happens when you multiply a number by its
reciprocal
5
66
5 = 1
Dividing is the same as MULTIPLYING BY THE
RECIPROCALexamples 1
443
41
43
412
3
61
85
685
485
Write this in your notes
How about mixed numbers
helliphint remember what we did with mixed numbers and multiplication
To divide mixed numbersjust change them to
improper fractions then use the rule
32
443
76
321
214
913
322
Practice by doing these
Some of you might not be convinced why this works
Letrsquos look at
43
76
which we can write ashellip
4376
=2124
multiply the top and bottom byhellip
- Dividing Fractions
- Slide 2
- Slide 3
- Slide 4
- Slide 5
- Slide 6
- Slide 7
-
Dividing is the same as MULTIPLYING BY THE
RECIPROCALexamples 1
443
41
43
412
3
61
85
685
485
Write this in your notes
How about mixed numbers
helliphint remember what we did with mixed numbers and multiplication
To divide mixed numbersjust change them to
improper fractions then use the rule
32
443
76
321
214
913
322
Practice by doing these
Some of you might not be convinced why this works
Letrsquos look at
43
76
which we can write ashellip
4376
=2124
multiply the top and bottom byhellip
- Dividing Fractions
- Slide 2
- Slide 3
- Slide 4
- Slide 5
- Slide 6
- Slide 7
-
How about mixed numbers
helliphint remember what we did with mixed numbers and multiplication
To divide mixed numbersjust change them to
improper fractions then use the rule
32
443
76
321
214
913
322
Practice by doing these
Some of you might not be convinced why this works
Letrsquos look at
43
76
which we can write ashellip
4376
=2124
multiply the top and bottom byhellip
- Dividing Fractions
- Slide 2
- Slide 3
- Slide 4
- Slide 5
- Slide 6
- Slide 7
-
32
443
76
321
214
913
322
Practice by doing these
Some of you might not be convinced why this works
Letrsquos look at
43
76
which we can write ashellip
4376
=2124
multiply the top and bottom byhellip
- Dividing Fractions
- Slide 2
- Slide 3
- Slide 4
- Slide 5
- Slide 6
- Slide 7
-
Some of you might not be convinced why this works
Letrsquos look at
43
76
which we can write ashellip
4376
=2124
multiply the top and bottom byhellip
- Dividing Fractions
- Slide 2
- Slide 3
- Slide 4
- Slide 5
- Slide 6
- Slide 7
-