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Multiplying a 3 digit number by a 2 digit number Using the grid method

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First, split the 3 digit number into hundreds, tens and units. For example; 642 is split up as 600, 4O and 2 275 is split up as 200, 70 and 5 356 is split up as 300, 50 and 6

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Then, split the 2 digit number into tens and units For example; 67 is split up as 6O and 7 89 is split up as 80 and 9 36 is split up as 30 and 6

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Then put the 3 digit number on the top part of the grid and the 2 digit number that you are multiplying by down the side of the grid. For example: 642 x 89: Then multiply the hundreds (600) by the tens (80): Then multiply the tens (40) by the tens (80): x600402 80 9 89 x600402 8048000 9 x600402 80480003200 9

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Now multiply the hundreds (600) by the units (9): Then multiply the units (2) by the tens (80): x600402 80480003200160 9 X600402 80480003200160 95400 Then multiply the tens (40) by the units (9): X600402 80480003200160 95400360

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Then multiply the units (2) by the units (9): X600402 80480003200160 9540036018 Finally, add the 6 answers together: 642 x 89 = 48000 + 3200 + 160 + 5400 + 360 + 18 = 57138

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Grid method for multiplying by a 1 digit number. 1.Firstly, write the multiplication sum and then draw the grid. The largest number goes at the top so.

Grid method for multiplying by a 1 digit number. 1.Firstly, write the multiplication sum and then draw the grid. The largest number goes at the top so.

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