0

36 x 25 = (36)·(25) = (30 + 6)·(20 + 5)
= (   )x100 + 15x10 + 12x10 + 30
= (   )x100 + 150 + 120 + 30 =     900

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  1 of 10

FirstOuterInnerLast

 

Level

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2

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How Many

5

10

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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