Presentation is loading. Please wait.

Presentation is loading. Please wait.

EXAMPLE 2 Solving a Problem Junior Iditarod Race In the 2001 Junior Iditarod race, one team completed the race in about 18 hours over two days. The team’s.

Published byTracy Parrish Modified over 9 years ago

Similar presentations

Presentation on theme: "EXAMPLE 2 Solving a Problem Junior Iditarod Race In the 2001 Junior Iditarod race, one team completed the race in about 18 hours over two days. The team’s."— Presentation transcript:

1 EXAMPLE 2 Solving a Problem Junior Iditarod Race In the 2001 Junior Iditarod race, one team completed the race in about 18 hours over two days. The team’s average rate was 8.325 miles per hour. About how long was the race? Round to the nearest mile.

2 EXAMPLE 2 Solving a Problem Use the formula Distance = Rate Time SOLUTION

3 EXAMPLE 2 Solving a Problem Use the formula Distance = Rate Time SOLUTION 8.325 18

4 EXAMPLE 2 Solving a Problem Use the formula Distance = Rate Time SOLUTION 8.325 18 66600 8325 149.850 Place the decimal point before dropping any zeroes

5 EXAMPLE 2 Solving a Problem Use the formula Distance = Rate Time SOLUTION 8.325 18 66600 8325 149.850 Place the decimal point before dropping any zeroes ANSWER The race was about 150 miles long.

6 EXAMPLE 3 Checking for Reasonableness Use estimation to check that the answer to Example 2 is reasonable.

7 EXAMPLE 3 Checking for Reasonableness Use estimation to check that the answer to Example 2 is reasonable. Distance = 8.325 18

8 EXAMPLE 3 Checking for Reasonableness Round 8.325 to its leading digit. Use estimation to check that the answer to Example 2 is reasonable. Distance = 8.325 18 8 18

9 EXAMPLE 3 Checking for Reasonableness Round 8.325 to its leading digit. Use estimation to check that the answer to Example 2 is reasonable. Distance = 8.325 18 8 18 = 144

10 EXAMPLE 3 Checking for Reasonableness Round 8.325 to its leading digit. Use estimation to check that the answer to Example 2 is reasonable. Distance = 8.325 18 8 18 = 144 ANSWER Because 150 is close to 144, the distance is reasonable.

11 GUIDED PRACTICE for Example 2 and 3 Find the product. 5. 0.9 50

12 GUIDED PRACTICE for Example 2 and 3 Find the product. 5. 0.9 50 = 45

13 GUIDED PRACTICE for Example 2 and 3 Find the product. 5. 0.9 50 = 45 6. 1.505 8

14 GUIDED PRACTICE for Example 2 and 3 Find the product. 5. 0.9 50 = 45 6. 1.505 8 = 12.04

15 GUIDED PRACTICE for Example 2 and 3 Find the product. 5. 0.9 50 = 45 6. 1.505 8 = 12.04 7. 3.14 75

16 GUIDED PRACTICE for Example 2 and 3 Find the product. 5. 0.9 50 = 45 6. 1.505 8 = 12.04 7. 3.14 75 = 235.5

17 GUIDED PRACTICE for Example 2 and 3 Bicycle Race You complete the first leg of a bike race in about 12 hours over two days. Your cyclometer shows that your average speed for this leg was 15.95 miles per hour. About how long was this leg of the race?

18 GUIDED PRACTICE for Example 2 and 3 Bicycle Race You complete the first leg of a bike race in about 12 hours over two days. Your cyclometer shows that your average speed for this leg was 15.95 miles per hour. About how long was this leg of the race? ANSWERAbout 192 miles

19 GUIDED PRACTICE for Example 2 and 3 Use estimation to check whether the answer is reasonable. 9. 3.254 18; 58.572

20 GUIDED PRACTICE for Example 2 and 3 Use estimation to check whether the answer is reasonable. 9. 3.254 18; 58.572 The answer is reasonable.

21 GUIDED PRACTICE for Example 2 and 3 Use estimation to check whether the answer is reasonable. 9. 3.254 18; 58.572 The answer is reasonable. 10. 12.706 3; 381.18

22 GUIDED PRACTICE for Example 2 and 3 Use estimation to check whether the answer is reasonable. 9. 3.254 18; 58.572 The answer is reasonable. 10. 12.706 3; 381.18 The answer is not reasonable.

23 GUIDED PRACTICE for Example 2 and 3 Use estimation to check whether the answer is reasonable. 9. 3.254 18; 58.572 The answer is reasonable. 10. 12.706 3; 381.18 The answer is not reasonable. 11. 15.312 4; 61.248

24 GUIDED PRACTICE for Example 2 and 3 Use estimation to check whether the answer is reasonable. 9. 3.254 18; 58.572 The answer is reasonable. 10. 12.706 3; 381.18 The answer is not reasonable. 11. 15.312 4; 61.248 The answer is reasonable.

25 GUIDED PRACTICE for Example 2 and 3 12. Explain why the answer 84 is not reasonable for the product 3 2.8.

Download ppt "EXAMPLE 2 Solving a Problem Junior Iditarod Race In the 2001 Junior Iditarod race, one team completed the race in about 18 hours over two days. The team’s."

Similar presentations

EXAMPLE 1 Standardized Test Practice SOLUTION Substitute several values of h into the equation C = 10 + 7h and solve for C.Then identify the table that.

EXAMPLE 1 Standardized Test Practice SOLUTION Substitute several values of h into the equation C = h and solve for C.Then identify the table that.
5 Minute Check Estimate and divide .Round to the nearest tenth, if necessary. 1. 10.22 ÷ 14 2. 59.84 ÷ 32 3. 751.2 ÷ 25 4. 6271 ÷ 4.

5 Minute Check Estimate and divide .Round to the nearest tenth, if necessary ÷ ÷ ÷ ÷ 4.
Solving Multiplication and Division Equations. EXAMPLE 1 Solving a Multiplication Equation Solve the equation 3x = 45 3 3 x = 15 Check 3x = 45 3 (15)

Solving Multiplication and Division Equations. EXAMPLE 1 Solving a Multiplication Equation Solve the equation 3x = x = 15 Check 3x = 45 3 (15)
Prerequisite Skills VOCABULARY CHECK 1.

Prerequisite Skills VOCABULARY CHECK 1.
EXAMPLE 1 Using a Variable Expression Hot Air Balloons You are riding in a hot air balloon. After traveling 5 miles, the balloon speed changes to 6 miles.

EXAMPLE 1 Using a Variable Expression Hot Air Balloons You are riding in a hot air balloon. After traveling 5 miles, the balloon speed changes to 6 miles.
Rounding Numbers Lesson 1.4.1.

Rounding Numbers Lesson
L E S S O N 2 3 . Multiplying Decimals 0.7

L E S S O N Multiplying Decimals 0.7
5 Minute Check Complete in your notebook. Estimate each product. 1. 9.7 x 3 2. 3.4 x 5 3. 17.5 x 8 Multiply. 4. 1.5 x 6 5. 3.1 x 13 6. 3.48 x 25.

5 Minute Check Complete in your notebook. Estimate each product x x x 8 Multiply x x x 25.
7 = 7 SOLUTION EXAMPLE 1 Check the intersection point Use the graph to solve the system. Then check your solution algebraically. x + 2y = 7 Equation 1.

7 = 7 SOLUTION EXAMPLE 1 Check the intersection point Use the graph to solve the system. Then check your solution algebraically. x + 2y = 7 Equation 1.
EXAMPLE 1 Use a formula High-speed Train The Acela train travels between Boston and Washington, a distance of 457 miles. The trip takes 6.5 hours. What.

EXAMPLE 1 Use a formula High-speed Train The Acela train travels between Boston and Washington, a distance of 457 miles. The trip takes 6.5 hours. What.
Estimation GLE 0506.1.2 Apply and adapt a variety of appropriate strategies to problem solving, including estimation, and reasonableness of the solution.

Estimation GLE Apply and adapt a variety of appropriate strategies to problem solving, including estimation, and reasonableness of the solution.
EXAMPLE 1 Use a formula High-speed Train The Acela train travels between Boston and Washington, a distance of 457 miles. The trip takes 6.5 hours. What.

EXAMPLE 1 Use a formula High-speed Train The Acela train travels between Boston and Washington, a distance of 457 miles. The trip takes 6.5 hours. What.
L E S S O N 13.5 Multiplying Decimals 0.7

L E S S O N 13.5 Multiplying Decimals 0.7
Dividing Decimals 3-3. When you divide two numbers, you can multiply both numbers by the same power of ten without changing the final answer. Multiply.

Dividing Decimals 3-3. When you divide two numbers, you can multiply both numbers by the same power of ten without changing the final answer. Multiply.
EXAMPLE 2 Find the quotient 14 8 Writing Additional Zeros.

EXAMPLE 2 Find the quotient 14 8 Writing Additional Zeros.
You have learned to use the standard algorithm to multiply 2,3, and 4 digit numbers by a 1 digit number. Today, you will estimate to check if your answer.

You have learned to use the standard algorithm to multiply 2,3, and 4 digit numbers by a 1 digit number. Today, you will estimate to check if your answer.
EXAMPLE 2 Evaluate logarithms 4 log a.64 b. 5 log 0.2 Evaluate the logarithm. b logTo help you find the value of y, ask yourself what power of b gives.

EXAMPLE 2 Evaluate logarithms 4 log a.64 b. 5 log 0.2 Evaluate the logarithm. b logTo help you find the value of y, ask yourself what power of b gives.
EXAMPLE 2 Evaluate logarithms 4 log a.64 b. 5 log 0.2 Evaluate the logarithm. b logTo help you find the value of y, ask yourself what power of b gives.

EXAMPLE 2 Evaluate logarithms 4 log a.64 b. 5 log 0.2 Evaluate the logarithm. b logTo help you find the value of y, ask yourself what power of b gives.
EXAMPLE 1 Using the Commutative Property SOLUTION Write a verbal model to find the total distance you can cycle in 5 days. Tour Biking You are going on.

EXAMPLE 1 Using the Commutative Property SOLUTION Write a verbal model to find the total distance you can cycle in 5 days. Tour Biking You are going on.
Using a Commutative Property You are going on a 400 mile bike trip. You plan to cycle at an average speed of 12 miles per hour for 7 hours per day. Can.

Using a Commutative Property You are going on a 400 mile bike trip. You plan to cycle at an average speed of 12 miles per hour for 7 hours per day. Can.

Similar presentations

Ads by Google