Topic H Multi-Digit Multiplication Strategies
Lesson 34 - 38
Math Do Now
Solve the following conversions
1.5 yards x 72 =
108 x 10 cents
($3.60 x 47) + ($1.50 x 29)
47 x 103
Now try these…
12.5 = ____ oz
1.05 m = ____ cm
5.7 kg = ____ g
56.75 lbs = ___ oz
CHALLENGE
5 days = ____ weeks
22 feel = _____ yards
44 inches = ____ feet
Lesson 34 & 35 Multi-Digit Multiplication
Content Goal: I can multiply 2 Digit Multiples of ten (20, 30, 40, 50…) by double digit numbers using place value, multiplication properties, area models, and standard algorithms and apply these strategies to solve multi-step word problems.
Process Goals: I can use my background knowledge and I
can generate questions while learning new strategies for multiplication
and division.
Lesson 34 & 35 Multi-Digit Multiplication
4 ones x 3 ones
4 tens x 3 ones
3 ones x 2 ones
3 tens x 2 ones
4 ones x 3 ones
4 tens x 3 ones
5 ones x 4 ones
5 tens x 4 tens
5 ones x 8 ones
5 tens x 8 tens
6 ones x 5 ones
4 tens x 3 tens
Lesson 34 & 35 Multi-Digit Multiplication
Area Model Proof
2 x 22
10 x 22
40 x 22
2
20
2
10
20
2
Lesson 34 & 35 Multi-Digit Multiplication
Place Value Proof
4 x 10 x 22 = 40 x 22
You Try:
50 x 31 = 5 x 10 x 31
Lesson 34 & 35 Multi-Digit Multiplication
Place Value Proof
50 x 31 = 5 x 10 x 31
40 x 22
21 x 30
30 x 43
50 x 39
Lesson 34 & 35 Multi-Digit Multiplication
Find the PRODUCT of 30 and 25
You Try
60 x 34
90 x 34
Lesson 34 & 35 Multi-Digit Multiplication
Practice Time
Lesson 35 pg. 233
1 - 9
TURN IN
Exit Ticket 35 pg. 235
Application Problem 36 PG. 237
Lesson 36 Multi-Digit Multiplication
Content Goal: I can multiply 2 Digit by 2 Digit numbers and identify four partial products using place value models, multiplication properties, area models, and standard algorithms, while applying these strategies to solve multi-step word problems.
Process Goals: I can use my background knowledge and I
can generate questions while learning new strategies for multiplication
and division.
Lesson 36 Multi-Digit Multiplication
Area Mode & Standard Algorithm
Create a word problem to match the Area Model shown.
Lesson 36, 37 & 38 Multi-Digit Multiplication
23 x 31
___ x __ ≈
26 x 34
___ x __ ≈
38 x 43
___ x __ ≈
Lesson 36 Multi-Digit Multiplication
Practice Time
Lesson 36 pg. 240
3, 4, 5, 6
Lesson 37 pg. 246
3, 4 a, b, c, d
TURN IN
Exit Ticket 36 pg. 241
Exit Ticket 37 pg. 247
Lesson 37 & 38 Multi-Digit Multiplication
Content Goal: I can use the STANDARD ALGORITHM to multiply 2 Digit by 2 Digit numbers and apply these strategies to solve multi-step word problems.
Process Goals: I can use my background knowledge and I
can generate questions while learning new strategies for multiplication
and division.
Lesson 38 Multi-Digit Multiplication
Application Problem 37
Prove it!
Words/Phrases to Use
Her answer is ____ b/c _____.
the partial products are
partial product product
multiply
add the total of
Lesson 38 Multi-Digit Multiplication
Application Problem 38
Prove it!
Words/Phrases to Use
Her answer is ____ b/c _____.
the partial products are
partial product product
multiply
add the total of
Multi-Digit Multiplication
Tenacious Task
Prove it!
Words/Phrases to Use
Mrs. Sherrill’s sister can bake ___ more cookies than Mrs. Sherrill b/c _______
the partial products are
partial product product
multiply
add the total of
Multi-Digit Multiplication
Tenacious Task
Prove it!
Words/Phrases to Use
Both teachers have _____ snack and I know this is reasonable because….
partial product product
multiply
add the total of
Both classes will get a total of ____ snacks b/c ___
Lesson 36, 37 & 38 Multi-Digit Multiplication
23 x 31
___ x __ ≈
26 x 34
___ x __ ≈
38 x 43
___ x __ ≈
Lesson 36 Multi-Digit Multiplication
Practice Time
Lesson 36 pg. 240
3, 4, 5, 6
Lesson 37 pg. 246
3, 4 a, b, c, d
TURN IN
Exit Ticket 36 pg. 241
Exit Ticket 37 pg. 247