20 Name Another Look! If a truck travels 9.5 miles on 1 gallon of fuel, how many miles will the truck travel on 5.6 gallons of fuel? Step 1 First, estimate your product so you can check for reasonableness. 9.5 × 5.6 10 × 6 = 60 An answer that is close to the estimate 60 will be reasonable. (2. 0.2 x 4.6 3. Step 2 Add all the partial products to find the answer. Use an area model if you need help keeping track of them. 5 3.9 X 7.1 0.6 1. If a truck travels 8.6 miles on 1 gallon of fuel, how many miles will the truck travel on 9.2 gallons of fuel? Estimate. Then, find the product. Is your answer is reasonable? Explain. 9 9 × 5 = 45 9x0.6 5.4 0.5 x 5 = 2.5 0.6 x 0.5 In 2-9, estimate first. Then multiply using partial products. Check that your answer is reasonable. 0.30 The truck will travel 53.2 miles on 5.6 gallons of fuel. Estimate: 8.6 x 9.2 Practice 4-6 Multiply Decimals Using Place Value (A.) 0.1 4. 5.4 x 0.5 X = 0.6 x 0.5 = 0.6 ×9= 5 x 0.5 = 5x9= 5. X + X 9.5 5.6 0.30 5.4 2.5 45 53.20 8.6 9.2 000 15.3 × 6.4

20 Name Another Look! If a truck travels 9.5 miles on 1 gallon of fuel, how many miles will the truck travel on 5.6 gallons of fuel? Step 1 First, estimate your product so you can check for reasonableness. 9.5 × 5.6 10 × 6 = 60 An answer that is close to the estimate 60 will be reasonable. (2. 0.2 x 4.6 3. Step 2 Add all the partial products to find the answer. Use an area model if you need help keeping track of them. 5 3.9 X 7.1 0.6 1. If a truck travels 8.6 miles on 1 gallon of fuel, how many miles will the truck travel on 9.2 gallons of fuel? Estimate. Then, find the product. Is your answer is reasonable? Explain. 9 9 × 5 = 45 9x0.6 5.4 0.5 x 5 = 2.5 0.6 x 0.5 In 2-9, estimate first. Then multiply using partial products. Check that your answer is reasonable. 0.30 The truck will travel 53.2 miles on 5.6 gallons of fuel. Estimate: 8.6 x 9.2 Practice 4-6 Multiply Decimals Using Place Value (A.) 0.1 4. 5.4 x 0.5 X = 0.6 x 0.5 = 0.6 ×9= 5 x 0.5 = 5x9= 5. X + X 9.5 5.6 0.30 5.4 2.5 45 53.20 8.6 9.2 000 15.3 × 6.4

Advanced Engineering Mathematics

10th Edition

ISBN:9780470458365

Author:Erwin Kreyszig

Publisher:Erwin Kreyszig

Chapter2: Second-order Linear Odes

Section: Chapter Questions

Problem 1RQ

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