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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.

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Presentation on theme: "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."— Presentation transcript:

1 6-5 Multiplying by 1 digit numbers and estimating to check for reasonableness

2 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 is reasonable.

3 The first three rows of a movie theater are empty
The first three rows of a movie theater are empty. What multiplication fact tells how many people are sitting in these rows? If you multiply by zero, what is the product?

4 A Cineplex contains 4 movie theaters. Each theater can seat 312 people
A Cineplex contains 4 movie theaters. Each theater can seat 312 people. Multiply to find how many people the Cineplex can seat in all. Then, check that your answer is reasonable.

5 Multiply 360 x 3 Then, check for reasaonableness

6 Find the product 6 x 4,296 Explain how you would estimate to check if your answer is reasonable.

7 Guided practice x 5 x 6

8 Work on page 152-153 numbers 9-32 Check with a friend See me.
Problem solve.


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