Post on 22-Feb-2016
description
transcript
Placing Fractions on Number LinesChapter 9
4.NF.3, 4.NF.3a, 4.NF.3b, 4.NF.3b, 4.NF.3c
A number line helps us visualize the order of numbers.
A number line helps us compare two or more numbers.
We can use a number line to place fractions. Let’s look at the section between 0 and 1 enlarged.
0 1
To place a fraction on a number line we have to think about the space between the whole numbers as the whole.
0 1
Now look at the denominator of the fraction and think…
0 1
14
Into how many equal parts will the whole be
equally divided?
Next look at the numerator of the fraction and think…
0 1
14
How many parts of the equal parts are we
talking about?
The point at which the unit ends on the number line is the placement for the fraction on the number line.
14
0 1
This is what the fraction on the number line would look like.
0 114
Let’s watch a video that shows this strategy for placing fractions on a number line.
Your turn to try.
0 1
13
Follow these steps. 1. Block the whole. 2. Look at the denominator and divide the
whole into equal pieces.3. Look at the numerator and shade in the
number of pieces we are talking about.
Your turn to try.
0 1
12
Follow these steps. 1. Block the whole. 2. Look at the denominator and divide the
whole into equal pieces.3. Look at the numerator and shade in the
number of pieces we are talking about.
Your turn to try.
0 1
16
Follow these steps. 1. Block the whole. 2. Look at the denominator and divide the
whole into equal pieces.3. Look at the numerator and shade in the
number of pieces we are talking about.
What if the numerator is greater than 1? This video helps us understand. (begin at 1 minute).
Your turn to try.
0 1
23
Follow these steps. 1. Block the whole. 2. Look at the denominator and divide the
whole into equal pieces.3. Look at the numerator and shade in the
number of pieces we are talking about.
Your turn to try.
0 1
38
Follow these steps. 1. Block the whole. 2. Look at the denominator and divide the
whole into equal pieces.3. Look at the numerator and shade in the
number of pieces we are talking about.
Your turn to try.
0 1
56
Follow these steps. 1. Block the whole. 2. Look at the denominator and divide the
whole into equal pieces.3. Look at the numerator and shade in the
number of pieces we are talking about.
Now let’s read fractions on the number line.
0 1
Follow these steps. 1. Block the whole. 2. Determine the denominator by determining
how many equal pieces the whole is divide into.
3. Determine the numerator by filling in the equal parts in to the point on the number line.
My Answer:
You Try!Follow these steps. 1. Block the whole. 2. Determine the denominator by determining
how many equal pieces the whole is divide into.
3. Determine the numerator by filling in the equal parts in to the point on the number line.
My Answer:
0 1
You Try!Follow these steps. 1. Block the whole. 2. Determine the denominator by determining
how many equal pieces the whole is divide into.
3. Determine the numerator by filling in the equal parts in to the point on the number line.
My Answer:
0 1
You Try!Follow these steps. 1. Block the whole. 2. Determine the denominator by determining
how many equal pieces the whole is divide into.
3. Determine the numerator by filling in the equal parts in to the point on the number line.
My Answer:
0 1
How did you do?