Lattice Multiplication Practice Template
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1
2Name
Date
3–14
Lattice Multiplication Practice
5
8
Use a lattice multiplication grid to multiply 4
85.
4
First, make your lattice. The factor 4 has one digit. The factor
85 has two digits. So, make your lattice one-by-two. Label the
5
8
sides with the factors, as shown.
4
Next, draw a diagonal in each square.
Now you are ready to start multiplying. Begin at the
8
5
right: 4
5
20. Write 20 in the right-hand square. Write
3
2
2 above the diagonal. Write 0 below the diagonal. Then
4
2
0
multiply 4
8
32. Write 32 in the next square.
The next step is to add the numbers in the diagonals and
5
8
write the sums around the lattice.
3
2
3
4
2
0
Finally, read the product. Start at the left and read down
4
0
and across the bottom: 340. So, 4
85
340.
Use lattice multiplication to find each product. Use
a separate sheet of paper if necessary.
5
35
9
64
7
53
1.
2.
3.
2
99
6
47
3
75
4.
5.
6.
Explain You filled in the squares of your lattices with two-digit numbers. What should
7.
you do if you have a one-digit number to write in a square of a lattice? Try 2
36.
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