Transcript Math-Module-2-Lesson-10

Module 2 Lesson 10
Multiply decimal fractions with tenths by multi-digit
whole numbers using place value understanding to
record partial products.
Common Core
Standards
5.NBT.7 Add, subtract, multiply, and divide decimals to hundredths,
using concrete models or drawings and strategies based on place
value, properties of operations, and/or the relationship between
addition and subtraction; relate the strategy to a written method
and explain the reasoning used.
Learning Targets
• I can multiply decimal fractions with
tenths by multi-digit whole numbers
using place value understanding to
record partial products.
Activate
Knowledge
3 × 2 is?
Activate
Knowledge
3 × 2 x 10 ÷ 10 is?
Activate
Knowledge
5 × 0.3 is?
Activate
Knowledge
5 × 0.3 x 10 ÷ 10 is?
Activate
Knowledge
3 × 2.5 is?
Activate
Knowledge
3 × 2.5 x 10 ÷ 10 is?
Activate
Knowledge
2 × 3.4 is?
Activate
Knowledge
2 × 3.4 x 10 ÷ 10 is?
Activate
Knowledge
Why are the products the same when we multiply by
10 and then divide by 10?
Activate
Knowledge
Write the word name
7.463
Activate
Knowledge
Represent this number in a two-part
number bond with ones as one part and
thousandths as the other part
7.463
Activate
Knowledge
Represent it again with tenths and
thousandths.
7.463
Activate
Knowledge
Represent it again with hundredths and
thousandths.
7.463
Activate
Knowledge
Write the word name
8.972
Activate
Knowledge
Represent this number in a two-part
number bond with ones as one part and
thousandths as the other part
8.972
Activate
Knowledge
Represent it again with tenths and
thousandths.
8.972
Activate
Knowledge
Represent it again with hundredths and
thousandths.
8.972
Activate
Knowledge
Write the word name
6.849
Activate
Knowledge
Represent this number in a two-part
number bond with ones as one part and
thousandths as the other part
6.849
Activate
Knowledge
Represent it again with tenths and
thousandths.
6.849
Activate
Knowledge
Represent it again with hundredths and
thousandths.
6.849
Activate
Knowledge
The fifth-grade craft club is making aprons to sell. Each
apron takes 1.25 yards of fabric that costs $3 per yard and
4.5 yards of trim that costs $2 per yard. What does it cost
the club to make one apron? If the club wants to make
$1.75 profit on each apron, how much should they charge
per apron?
Learn
Round the factors to estimate the product.
43 × 2.4
Problem 1
Learn
Predict whether our estimate is greater
than or less than the actual product.
43 × 2.4
Problem 1
Learn
There are 43 units of 2.4. How
many tenths is 2.4?
43 × 2.4
Problem 1
Learn
Solve using the standard algorithm
43 × 24 tenths
Problem 1
Learn
2.4
 43
x 10
24 Tenths
 43
72
960
÷ 10
1032
103.2
Problem 1
Learn
Round the factors to estimate the product.
3.5 × 42
Problem 1
Learn
Predict whether our estimate is greater
than or less than the actual product.
3.5 × 42
Problem 1
Learn
There are 43 units of 2.4. How
many tenths is 2.4?
3.5 × 42
Problem 1
Learn
Solve using the standard algorithm
35 tenths x 42
Problem 1
Learn
Round the factors to estimate the product.
15.6 × 73
Problem 1
Learn
Predict whether our estimate is greater
than or less than the actual product.
15.6 × 73
Problem 1
Learn
There are 43 units of 2.4. How
many tenths is 2.4?
15.6 × 73
Problem 1
Learn
Solve using the standard algorithm
156 tenths x 73
Problem 1
Practice
Review