Multiplying Multiplying Big NumbersBig Numbers

By Mr. WalkerBy Mr. Walker

The ProblemThe Problem

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x 32x 32

Getting Ready Getting Ready Always start on the rightAlways start on the right

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Step 1 Step 1 2x4=82x4=8

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88

Step 2 Step 2 2x5=102x5=10

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0088

1

Step 3 Step 3 (2x2)+1=5(2x2)+1=5

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550808

1

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508508

Step 4 Step 4 You are done with the 2, now cross it out and start You are done with the 2, now cross it out and start again with the three. Cross out or erase your carrying again with the three. Cross out or erase your carrying numbers from the top.numbers from the top.

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00

Step 5 Step 5 Before you start you need to put a Before you start you need to put a 00 under the 8. under the 8.

ALWAYSALWAYS PUT A PUT A 00 IN THAT SPOT!!!!!!! IN THAT SPOT!!!!!!!

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2200

Step 6 Step 6 3x4=123x4=12

1

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508508

662020

Step 7 Step 7 (3x5)+1=16 (3x5)+1=16

11

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508508

77620620

Step 8 Step 8 (3x2)+1=7 (3x2)+1=7

11

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508508

76207620

Step 9Step 9You will now add the two rows You will now add the two rows

of answers together.of answers together.11

+

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76207620 88

Step 10Step 108+0=88+0=8

11

+

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76207620 2288

Step 11Step 110+2=20+2=2

11

+

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508508

76207620 112828

Step 11Step 115+6=115+6=11

11

+

1

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508508

7620762088128128

Step 12Step 12 (7+nothing) (7+nothing)

+1=8+1=8 11

+

1

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508508

7620762081288128

You Are DoneYou Are Done 8128 is the 8128 is the

answeranswer 11

+

1

AnswerAnswer

GREAT JOB!GREAT JOB!