lattice multiplication is an alternative way of doing higher level multiplication
TRANSCRIPT
LATTICE MULTIPLICATION
Tutorial 1
Lattice Multiplication is an alternative way of
doing higher level multiplication.
By creating a series of grids (boxes) and
following a few rules you can easily and neatly find
the product to large numbers.
Today’s Example:
64 x 9 =
First, write the larger number down.
6 4
Draw a rectangle below this number.
6 4
The larger number is made up of 2 digits, so cut the rectangle into
two boxes.
6 4
Write the other problem number on the right of
the rectangle.
6 49
Cut the boxes diagonally. For each box draw a line from the bottom left to
the top right.
6 49
Now we do basic multiplication. Start with the 6. If we go
down from the 6 and across from the 9 they
“meet” in that first box.
6 49
6 x 9 = 5 4Write 5 in the top half of
the box and write 4 in the bottom half of the
box.
6 495
4
Move on to the 4. If we go down from the 4 and across from the 9 they “meet” in that second
box.
6 495
4
4 x 9 = 3 6 Write 3 in the top half of
the box and write 6 in the bottom half of the
box.
6 495
43
6
Extend your diagonal lines down.
6 495
43
6
Add the numbers inside the boxes. Use the diagonal lines
to guide you. Start on the right with the 6 then move to the left. 6 + nothing = 6. So put a 6 on the right of
the diagonal lines.
6 495
43
66
3 + 4 = 7. So put a 7 between the diagonal
lines.
6 495
43
667
5 + nothing = 5. So put a 5 to the left of the
diagonal lines.
6 495
43
667
5
That’s it!576 is your answer.
6 4 x 9 = 5 7 6
ON YOUR OWNTry the following
problem using the rules from the example. The answer will be the first
thing given in TUTORIAL 2.
On Your Own Problem:
52 x 7 =