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
Related questions
Question
Transcribed Image Text: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
2.
An answer that is
close to the estimate 60
will be reasonable.
0.2
x 4.6
6. 9.3 x 5.8
3.
Step 2
Add all the partial products to find the answer.
Use an area model if you need help keeping track
of them.
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.
3.9
X 7.1
0.6
5
7. 23.7 x 4.4
(C.
9 × 5 = 45
In 2-9, estimate first. Then multiply using partial products.
Check that your answer is reasonable.
9
9 x 0.6 = 5.4
0.5 X 5 = 2.5
4.
The truck will travel 53.2 miles
on 5.6 gallons of fuel.
-
0.6 x 0.5 = 0.30
Estimate:
8.6 × 9.2
Practice 4-6
Multiply Decimals
Using Place Value
5.4
× 0.1
0.5
8.0.8 x 0.5
Go Online SavvasRealize.com
0.6 × 0.5 =
0.6 × 9 =
5 x 0.5 =
5x9=
X
× 0-0
X
+
X
9.5
5.6
0.30
5.4
2.5
45
53.20
8.6
9.2
0
000
0000
0000
5. 15.3
× 6.4
9. 13.2 x 0.3
Topic 4 Lesson 4-6
57
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