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Divide Whole Numbers by Fractions
4.6 p. 305
32
32
The denominator becomes the numerator. The numerator becomes the denominator. The fraction is “flipped” or inverted.
The fraction must firstbe in form.
5
51
15
15
53
31
111
111
Write the problem Keep the first number (dividend) Change the division sign to multiplication Flip (invert the divisor) and multiply by this reciprocal.
KeepChangeFlip
71
32
71
32
212
2121012
61÷13
61∙31
¿18
51÷23
51∙32
152
=712
Cancelling inmultiplicationonly!!
41÷34
41∙43
163
=513
How many 45 minute games can be played in 6 hours?
1 game
*
1game
*
1game
*
1game
*
1game
*
1game
*
6 games + 2 more
What is happening in our equation???????
When we multiply 6 x 4, we are finding how many fourths are in 6 hours.There are 24 fourths in 6 hours.
The 24 that we have is now dividedinto groups of 3. Twenty four sectionsdivided by 3 gives us our 8 games.
23
32
17
71
41
14
21÷13
21∙31
61=6
21÷45
21∙54
52=2
12
1
2
51÷27
51∙72
352
=1712
Equations
Models
How many sections are there?
6
This next part is a bittricky…..we are talkingabout 4 sections, right? Well, there are 2 left over.Two is ½ of 4, so 2 ½
212
Next slide
5
17 groups with 1 out of 2 left over. 17
41÷23
41∙32
lots
4÷23
2
1
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