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206 x 107 = (206)·(107) = (200 + 6)·(100 + 7)
= 200x100 + 140x10 + 60x10 + (    )
= 20000 + 1400 + 600 + (    ) =     22042

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  1 of 5

FirstOuterInnerLast

 

Level

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How Many

5

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30

50

  

FOIL method @

 

Example >>>

 34 x 52 =  (30 + 4)·(50 + 2)

 

 

 

  

First

(A + B)·(C + D) = AC + AD + BC + BD

= 30 x 50

= 1500

Outer

(A + B)·(C + D) = AC + AD + BC + BD

= 30 x 2

=     60

Inner

(A + B)·(C + D) = AC + AD + BC + BD

= 4 x 50

=   200

Last

(A + B)·(C + D) = AC + AD + BC + BD

= 4 x 2

=       8

 

 

    

 

  

 

= 1768