Multi-Digit Multiplication Strategies
Presentation
•
Mathematics
•
4th Grade
•
Practice Problem
•
Easy
Standards-aligned
Ryleigh Tatum
Used 3+ times
FREE Resource
13 Slides • 12 Questions
1
Exploring Multiplication Strategies
Today I will identify and practice strategies for multiplication of large numbers.
So that I can solve large problems without a calculator.
I’ll know I have it when I can complete a Quizizz Checkin with 80% accuracy.
2
Word Cloud
What is multiplication?
3
Utilizes place value and area models to solve multiplication problems
Box Method
Decomposes multiplication problems into more manageable problems.
Partial Product
Decomposes multiplication problems into more manageable problems.
Distributive
Traditional algorithm for solving multiplication problems.
Standard Method
4
Draw and label a box to represent your problem (use number of digits)
Multiply each section
Add together each section
Box Method
23 x 6 = __________
5
Labelling
Label each part of the multiplication box to solve the problem: 83 x 4
83
12
80
3
320 + 12 = 332
7
32 + 12 = 44
32
4
320
6
Draw
Draw and solve using the Box Method for the following problem:
83 x 4
7
Draw and label a box to represent your problem (use number of digits)
Multiply each section
Add together each section
Box Method
15 x 22 = __________
8
Labelling
Label each part of the multiplication box to help solve the problem: 14 x 22
8
22
200
80
20
4
14
20
10
2
9
Draw
Draw and solve using the Box Method for the following problem:
14 x 22
10
Draw and label a box to represent your problem (use number of digits)
Multiply each section
Add together each section
Box Method
294 x 3 = __________
11
Labelling
Label each part of the multiplication box to help solve the problem: 324 x 7
32
20
14
140
210
300
2,100
7
28
4
12
Draw
Draw and solve using the Box Method for the following problem:
324 x 7
13
Stand up behind your seat
Cross one foot over the other
Cross one arm over the other and twist up
Brain Break
14
Partial Products
Identify place value pieces
Multiply each number using their place value
Add together the products
45
x 89
45 (9x5)
360 (9x40)
400 (80x5)
+ 3,200 (80x40)
4,005
15
16
Partial Products
Identify place value pieces
Multiply each number using their place value
Add together the products
93 x 64
17
Draw
Draw and solve the following problem using the partial product strategy:
62 x 47
18
62 x 15
(60 + 2) x (10 + 5)
(60 x 10) + (60 x 5) + (2 x 10) + (2 x 5)
600 + 300 + 20 + 10
930
Break up each number into expanded form
Distribute multiplication - multiply each number by each piece
Add together products
Distributive
19
56 x 32
Break up each number into expanded form
Distribute multiplication - multiply each number by each piece
Add together products
Distributive
20
Draw
Draw and solve the following problem using the standard strategy:
94 x 16
21
+1
+1
18
x 24
72
+360
432
Line up multiplication problem vertically
Multiply top numbers by bottom number's ones place
Add a 0 placeholder!
Multiply top numbers by bottom number's ten's place
Add together products
** May require regrouping!
Standard
22
38 x 12
Line up multiplication problem vertically
Multiply top numbers by bottom number's ones place
Add a 0 placeholder!
Multiply top numbers by bottom number's ten's place
Add together products
** May require regrouping!
Standard
23
Draw
Draw and solve the following problem using the distributive strategy:
83 x 14
24
Poll
Which method makes the most sense to you?
Standard
Box Method
Partial Product
Distributive
25
Match
Solve and match each of the following problems to their correct product.
312 x 4
75 x 18
31 x 64
81 x 6
45 x 9
1,248
1,350
1,984
486
405
1,248
1,350
1,984
486
405
Exploring Multiplication Strategies
Today I will identify and practice strategies for multiplication of large numbers.
So that I can solve large problems without a calculator.
I’ll know I have it when I can complete a Quizizz Checkin with 80% accuracy.
Show answer
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