module 2 lesson 8
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Module 2 Lesson 8. Fluently multiply multi-digit whole numbers using the standard algorithm and using estimation to check for reasonableness of the product. Common Core Standards. - PowerPoint PPT PresentationTRANSCRIPT
Module 2 Lesson 8Fluently multiply multi-digit whole numbers using the standard algorithm and using estimation to
check for reasonableness of the product.
• 5.OA.2 Write simple expressions that record calculations with numbers, and interpret numerical expressions without evaluating them. For example, express the calculation “add 8 and 7, then multiply by 2” as 2 × (8 + 7). Recognize that 3 × (18932 + 921) is three times as large as 18932 + 921, without having to calculate the indicated sum or product.
5.NBT.5 Fluently multiply multi-digit whole numbers using the standard algorithm.
Common CoreStandards
Learning Targets
•I can fluently multiply multi-digit whole numbers using the standard algorithm and using estimation to check for reasonableness of the product.
Activate Knowledge
What is the base?
102
Activate Knowledge
What is the exponent?
102
Activate Knowledge
Convert to a multiplication sentence with the answer.
102
Activate Knowledge
What is the base?
103
Activate Knowledge
What is the exponent?
103
Activate Knowledge
Convert to a multiplication sentence with the answer.
103
Activate Knowledge
What is the base?
104
Activate Knowledge
What is the exponent?
104
Activate Knowledge
Convert to a multiplication sentence with the answer.
104
Activate Knowledge
What is the base?
105
Activate Knowledge
What is the exponent?
105
Activate Knowledge
Convert to a multiplication sentence with the answer.
105
Activate Knowledge
What is the base?
107
Activate Knowledge
What is the exponent?
107
Activate Knowledge
Convert to a multiplication sentence with the answer.
107
324 × 251
Activate Knowledge
324 × 201
Activate Knowledge
Activate KnowledgeErin and Frannie entered a rug design contest. The rules
stated that the rug’s dimensions must be 32 inches ×
45 inches and that they must use rectangles. They drew
the following for their entries. Show at least three other
designs they could have entered in the contest, and
calculate the area of each section and the total of your
rugs.
green red
yellowblue
30 2
5
40
red blue red
green yellow gree
n
red blue red
5 35 5
1
1
30
Learn
Problem 1
314 × 236
Round each factor to estimate the product.
Learn
Problem 1
314 × 236
Express the estimated product as a multiplication
expression with an exponent
Learn
Problem 1
314 × 236
We rounded both factors down. Will the product be
more or less than the estimate?
Learn
Problem 1
314 × 236
Solve using the standard algorithm
Learn
Problem 2
1,882 x 296
Round each factor to estimate the product.
Learn
Problem 2
1,882 x 296
We rounded both factors up. Will the product be more or less than the
estimate?
Learn
Problem 2
Solve using the standard algorithm
1,882 x 296
Learn
Problem 3
4,902 × 408
Round each factor to estimate the product.
Learn
Problem 3
4,902 × 408
We rounded one factor up and the other down. Will the
product be more or less than the estimate?
Learn
Problem 3
4,902 × 408
Solve using the standard algorithm
Practice
Review