1. 5.1/2 Rates and Ratios
Objective: Students will be able to write simple ratios three ways. They will also be able to make simple conversions. With the ratios, students will also be able to order them from least to greatest.

2. Information Ratio: use division to compare quantities.
Must be simplified!
3 ways to write:
a to b to 3
a : b 2 : 3
a / b / 3
Measurements:
1ft = 12in
1yd = 3ft = 36in
1h = 60min = 3600 sec
1lb =16oz
1mile = 5280ft.
1m = 100cm = 1000mm
1km = 1000m

3. Teacher ratio ex: Write 2 other ratios for 4:5 9 to 12
Person shoots 10 baskets. He made 8 and missed 2
Write ratio of makes to misses
Write a ratio of misses to total.

4. St. ratio Ex. Write as two other ratios 15/3 50:6
An eagle has a wing length of 124cm and a length of 13cm. Write a ratio of length to wing length.

5. Order least to greatest
2 to 9, 1:7, 7/28, 2 to 6
1 to 3, 2/8, 5:18, 7 to 20

6. Order the ratios least to greatest

7. Unit rates Unit rate: rate when denominator is 1 Ex: mile/hour
Find unit rates of:
140mi / 4gal.
$161 / 7 shares

8. Unit rates – St. 20ounces / 2.5 serving 1125 cal. / 4.5 hours
140 words / 4 min.

9. Equivalent Ratios Equivalent if same value 8 to 21 and 45 / 126

10. Equivalent Rates NOTE: pay attention to measurements! 5m = ?m 1sec 1h
5cm = ?cm
1min 1h
5m = ?m
1sec 1h

11. Equivalent Rates St 300 mi = ? mi 20 sec. 1min $43 = ? Dollars
1 day 1 week

12. Wrap-up
Questions/Comments
I.C/hw: worksheet