Solving Real World Equations

In the 2012 Olympics, Usain Bolt won the 200-meter dash with a time of

19.32 seconds. Write and solve an equation to find his average speed

to the nearest hundredth of a meter per second.

What should we do first?

• Solve the Problem

• Make a plan

• Understand the problem

• Look back

Tags

CCSS.6.EE.B.7

Tags

CCSS.6.EE.B.7

• Addition Property of Equality

• Subtraction Property of Equality

• Multiplication Property of Equality

• Division Property of Equality

Tags

CCSS.HSA.REI.A.1

• 10.35

• 3,864

• 180.68

• 219.32

Tags

CCSS.6.EE.B.7

In the 2012 Olympics, Usain Bolt won the 200-meter dash with a time of

19.32 seconds. Write and solve an equation to find his average speed

to the nearest hundredth of a meter per second.

Look Back:

If someone said that Usain Bolts average speed was about 10 seconds, is that reasonable based off of what we now know?

• Yes

• No

Tags

CCSS.6.EE.B.7

Suppose Usain Bolt ran 400 meters at the same average speed (10.35) that he ran the 200 meters. How long would it take him to run 400 meters? Round your answer to the nearest hundredth of a second (two decimal places).

Understand the Problem:

Tags

CCSS.HSF-LE.A.1B

Tags

CCSS.6.EE.B.7

• 4140

• 38.65

• 389.65

• 410.35

Tags

CCSS.6.EE.B.7

On January 22, 1943, the temperature in Spearfish, South Dakota, fell from 54°F at 9:00 a.m. to − 4°F at 9:27 a.m. How many degrees did the temperature fall?

Understanding the problem:

What are we being asked to do?

• Find the total amount of degrees the temperature changed

• Find the new temperature

• Find the starting temperature

Tags

CCSS.7.NS.A.1C

On January 22, 1943, the temperature in Spearfish, South Dakota, fell from 54°F at 9:00 a.m. to − 4°F at 9:27 a.m. How many degrees did the temperature fall?

• Temp. at 9:00 a.m. $=$ Temp. at 9:27 a.m. $-$ Number of degrees it fell

• Number of degrees it fell $=$ Temp. at 9:00 a.m. $-$ Temp. at 9:27 a.m. Number of degrees it fell

• Number of degrees it fell $=$ Temp. at 9:27 a.m. Number of degrees it fellTemp. at 9:00 a.m. $-$ Temp. at 9:00 a.m.

Tags

CCSS.7.NS.A.3