1. One Digit Multiplication
How do you multiply by 1- digit numbers?

2. One Digit Multiplication
Use Place value and regrouping.
Estimate
Check to see if the product is reasonable.

3. One Digit Multiplication
Each day an airline flies 9 commercial jets from New York to London, England. Each plane holds 293 passengers. If every seat is taken on all flights, how many people fly on this airline from New York to London in 1 day?
Use Place Value and Regrouping.

4. One Digit Multiplication

5. One Digit Multiplication
293 X 9 = __________
Estimate: _____ X 9 = _____
X 3 ones = _____ones
X Write the ones and regroup the tens

6. One Digit Multiplication
X 9 tens = _____tens
X Add the regrouped tens.
____tens + 2 tens = _____tens
Write the tens and the regrouped
hundreds.

7. One Digit Multiplication
X 2 hundreds = ____ hundreds X Add the regrouped hundreds.
______hundreds + 8 hundreds =___
hundreds
So, in 1 day, _______ passengers fly from NY to London.
How can you tell if your answer is reasonable?
What was your estimated answer?

8. One Digit Multiplication
A commercial airline makes several flight each week from New York to Paris, France. If the airline serves 1,978 meals on its flights each day, how many meals are served for the entire week?
(Remember: Repeat the process of multiplying and regrouping until every place value is multiplied.)

9. One Digit Multiplication
Estimate: _________ X _____ = _________
1,978 X

10. One Digit Multiplication
Estimate first, then solve.
X X X 7

11. One Digit Multiplication
Solve for the unknown number.
,12__ ,5__6
X X X
23__ _____ ,03__

12. One Digit Multiplication
What Is the Error?????
The Platsville Glee Club is sending 8 of its members to a singing contest in Cincinnati, Ohio. The cost will be $588 per person. How much will it cost for the entire group of 8 students to attend?
Both Brian and Jermaine solve the problem. Brian says the answer is $40,074. Jermaine’s answer is $4,604.

13. One Digit Multiplication
Estimate the cost:
A reasonable estimate is _______________
Although Jermaine’s answer seems reasonable, neither Brian nor Jermaine solved the problem correctly. Find the errors in Brian’s and Jermaine’s work. Then solve the problem correctly.

14. One Digit Multiplication
Brian Jermaine
X X 8
40, ,604
Now you solve the problem
X 8

15. One Digit Multiplication
What error did Brian make?
What error did Jermaine make?
How could you predict that Jermaine’s answer might be incorrect using your estimate?

16. One Digit Multiplication
Textbook page 151