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Grid MethodGrid Method
Gelosian Gelosian MethodMethod
Partitioning Partitioning methodmethod
““Long” Long” multiplicationmultiplication
500 70 4
20
9
1000010000 14001400 8080
45004500 630630 3636
11480
5166
16646
+
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200 70 2
10
3
20002000 700700 2020
600600 210210 66
2 7 2 08 1 6
3 5 3 6
+
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20 4
2
10030
20002000 400400
4040
600600 120120
88
2 6 4 05 2 8
3 1 6 8+
Finished!Finished!
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300 80 5
300
20
9000090000 2400024000 15001500
60006000 16001600 100100
1 1 5 5 0 07 7 0 0
1 2 5 5 1 0
+
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Show me the Show me the next methodnext method18001800 480480 30306
2 3 1 0+
200 70 4
100
90
2000020000 70007000 400400
1800018000 63006300 360360
2 7 4 0 02 4 6 6 0
5 3 9 7 8
+
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14001400 490490 28287
1 9 1 8 +
That was the last of those examples. Why don’t you try a few practice That was the last of those examples. Why don’t you try a few practice questions or check out a different method.questions or check out a different method.
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2 7 21
36600
00 22
1122
00 77
66002200
6633551133
Read left to right Read left to right = 3536= 3536Finished!Finished!
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5 2 34
55511
11 22
0011
00 88
55220022
5533551133
Read left to right Read left to right = 23535= 23535Finished!Finished!
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22
3 2 72
17700
11 44
2200
00 44
330066
00
2233661100
Read left to right Read left to right = 70632= 70632 Finished!Finished!Return To Return To
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77622442211881111
11
00
6 8 35
68811
11 55
8844
44 00
663300
33
7722661188
Read left to right Read left to right = 388627= 388627 Finished!Finished!Return To Return To
Multiplication Multiplication MenuMenu
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88977222277445522
11
33
6 8 14
2
00 44
4411002255
Read left to right Read left to right = 1150149= 1150149 Finished!Finished!Return To Return To
Multiplication Multiplication MenuMenu
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922
11
11
233 2222 44
99
00 8800 2211 6611 2200 4400 9977 2255 4411 88
11
That was the last of those examples. Why don’t you try a few practice That was the last of those examples. Why don’t you try a few practice questions or check out a different method.questions or check out a different method.
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200 x 13
+ 70 x 13
+ 2 x 13
200 x 10 = 2000200 x 3 = 600
70 x 10 = 70070 x 3 = 210
2 x 10 = 20
2 x 3 = 6
3536Finished!Finished!Return To Return To
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800 x 16
+ 20 x 16
+ 5 x 16
800 x 10 = 8000800 x 6 = 4800
20 x 10 = 20020 x 6 = 120
5 x 10 = 50
5 x 6 = 30
13200Finished!Finished!Return To Return To
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900 x 57
+ 30 x 57
+ 8 x 57
900 x 50 = 45000900 x 7 = 6300
30 x 50 = 150030 x 7 = 210
8 x 50 = 400
8 x 7 = 56
53466Finished!Finished!Return To Return To
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300 x 251
+ 50 x 251
+ 9 x 251
90101Finished!Finished!
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300 x 200 = 60000300 x 50 = 15000300 x 1 = 300
50 x 200 = 1000050 x 50 = 250050 x 1 = 50
9 x 200 = 18009 x 50 = 4509 x 1 = 1
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2 7 2x 1 3
612
80272+
3 5 3 63 5 3 6
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6 2 4x 3 7
862
4 30271 8+
2 3 0 8 82 3 0 8 8
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5 8 2x 7 5
011
2 90474 0+
4 3 6 5 04 3 6 5 0
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415
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