Worksheet 3b: Ordering Fractions Download

Transcript
Worksheet 3b: Ordering Fractions
Several methods –
1. draw fractions and or picture them in your head
(Remember: the bigger the denominator the smaller the piece)
2. use logic (see picture in your head)
3. change to equivalent fractions
4. change to decimals
Write fractions in order, least
rewrite the fractions in order.
1
9
= 1 ÷ 9 = 0.111111 …. = 0.1̅  1̇
to greatest.
Just put in numbers 1-4, you don’t need to
Use pictures and/or logic
1
8
3
7
9
9
9
9
2
2
2
2
10
3
8
6
1.
2.
3.
3
2
5
7
4
3
6
8
1. ASK: What is the common
multiple of the bottom numbers?
(denominator) or Which number
has 10, 5, 15, & 6 as a factor?
Use Equivalent Fractions
4.
Answer: 30
7×3
2×6
5×?
5×?
10×3
5×6
15×2
6× ?
2. THEN ASK 10 × what? = 30
21
30
30
30
30
10 × 3 = 30, therefore I also need
to do 7 × 3. If I multiply the bottom
number by a number I must
multiply the top by the same!!
Use equivalent fractions as illustrated in question #4. Show all your work!
5.
6.
7
1
3
17
16
2
8
32
5
2
5
5
17
12
3
6
8
32
Use calculator to convert fractions into decimals and then order
7.
8.
7
78
3
7
9
100
4
10
8
4
3
4
17
9
8
7
7
9
=7÷9=
0. 7777… = 0.7̅