Math Algorithm Video

1. By: Keri Adams

2. Welcome to Lattice
Multiplication

3. What is Lattice
Multiplication?
Lattice multiplication is a method of
multiplying large numbers using a grid. This
method breaks the multiplication process
into smaller steps; which for some, makes it
easier.

4. Setting up the Lattice
 First draw a grid that has as many rows and columns
as the multiplicand and the multiplier.
The grid below shows multiplying a 2-digit number by a 2-digit
number.
1 2
1
2

5. Drawing the grid:

6. Multiplicand vs. Multiplier
 What is a Multiplicand?
 A multiplicand is the
number that is or is to be
multiplied by another
number.
 What is a Multiplier?
 A multiplier is the number
by which another number
is multiplied
 For example: in 35 × 10,
the multiplicand is 35 and
the multiplier is 10.

7. Multiplicand and Multiplier?

8. Where to place the
Multiplicand and Multiplier
Example: 35 × 10
Multiplicand
3 5
1
Multiplier
0

9. Setting up the Lattice
 Draw a diagonal line
Ten through each box from
the upper right corner
to the lower left
s corner.
 This gives us a spot
Ones for the tens place and
a spot for the ones
place.

10. Quick review: Place Value

11. How to put the answer into
the lattice
Tens
1 4
One

12. 1 × 1 Lattice Multiplication
Video

13. 1 × 2 Lattice Multiplication
Video

14. 2 × 2 Lattice Multiplication
 Example:

15. First Second Third
Fourth Fifth Last
Answer:

16. 2 × 2 Lattice Multiplication
Video

17. Tips to Go:

18. References:
 http://www.coolmath4kids.com/times-tables/times-tables-lesson-lattice-
multiplication-3.html
 http://www.thefreedictionary.com/multiplicand
 http://www.thefreedictionary.com/multiplier
 http://www.free-maths-dictionary.com/multiplicand
 http://images.google.com/imgres?imgurl=http://www.math-
smarts.com/images/Chart.jpg&imgrefurl=http://www.math-
smarts.com/multiply.html&usg=__GFn-
qLLLyTmqym8SEUZTErbL8aM=&h=462&w=481&sz=50&hl=en&start=
27&um=1&tbnid=Sr9A70EW1v-
cuM:&tbnh=124&tbnw=129&prev=/images%3Fq%3Dmultiplication%2B
chart%26ndsp%3D20%26hl%3Den%26sa%3DN%26start%3D20%26u
m%3D1
 http://www.coolmath4kids.com/times-tables/times-tables-lesson-lattice-
multiplication-1.html