lattice multiplication step-by-step 356 * 25 = i don’t remember how to multiply!!!
Post on 23-Dec-2015
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Lattice Multiplication
Step-by-Step
356 * 25 =I don’t
remember how to multiply!!!
HELP!!! I can help!! Let me show you how to
do Lattice Multiplication.
356 * 25
3 5 6
2
5
Make a grid the exact size of your problem. A 2 digit number times a 3 digit number gets a 2 x 3 grid. Draw a diagonal line in each box.
356 * 25
3 5 6
2
5
12
Multiply 6 * 2 and place the answer in the grid where the lines meet.
356 * 25
3 5 6
2
5
120
1
Multiply 5 * 2 and place the answer in the grid where the lines meet.
356 * 25
3 5 6
2
5
120
16
0
Multiply 3 * 2 and place the answer in the grid where the lines meet. Use a zero as a place holder.
356 * 25
3 5 6
2
5
120
16
0
03
Multiply 6 * 5 and place the answer in the grid where the lines meet.
356 * 25
3 5 6
2
5
120
16
0
03
Multiply 5 * 5 and place the answer in the grid where the lines meet.
52
356 * 25
3 5 6
2
5
120
16
0
03
Multiply 3 * 5 and place the answer in the grid where the lines meet.
52
51
356 * 25
3 5 6
2
5
120
16
0
03
Now add the diagonals and place the answer below the grid. Be sure to carry to the next diagonal if you have a 2 digit answer.
52
51
0
356 * 25
3 5 6
2
5
120
16
0
03
Now add the diagonals and place the answer below the grid. Be sure to carry to the next diagonal if you have a 2 digit answer.
52
51
00
+1
356 * 25
3 5 6
2
5
120
16
0
03
Now add the diagonals and place the answer below the grid. Be sure to carry to the next diagonal if you have a 2 digit answer.
52
51
00
+1
9
356 * 25
3 5 6
2
5
120
16
0
03
Now add the diagonals and place the answer below the grid. Be sure to carry to the next diagonal if you have a 2 digit answer.
52
51
00
+1
98
356 * 25
3 5 6
2
5
120
16
0
03
Now add the diagonals and place the answer below the grid. Be sure to carry to the next diagonal if you have a 2 digit answer.
52
51
00
+1
98
356 * 25 =8,900
That is Soooo Cool!!!
Thanks!
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