0

207 x 59 = (207)·(59) = (190 + 17)·(50 + 9)
= 95x100 + 171x10 + 85x10 + (    )
= 9500 + 1710 + 850 + (    ) =     12213

1

31

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  1 of 50

FirstOuterInnerLast

 

Level

1

2

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How Many

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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