20,10 x 35 – 19,45 x 6 + 20,10 x 65 – 19,45 x 35

2 bình luận về “20,10 x 35 – 19,45 x 6 + 20,10 x 65 – 19,45 x 35”

1. 20,10 xx 35 – 19,45 xx 6 + 20,10 xx 65 – 19,45 xx 35

   = 20, 10 xx ( 35 + 65 ) – 19,45 xx ( 6 + 35 )

   = 20,10 xx 100 – 19,45 xx 41

   = 2010 – 797,45

   = 1212,55

   @ma

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2. 20,10 xx 35 – 19,45 xx 6 + 20,10 xx 65 – 19,45 xx 35

   =  20,10 xx ( 35 + 65) – 19,45 xx (6 + 35)

   = 20,10 xx 100 – 19,45 xx 41

   = 2010 –  797,45

   = 1212,55

   —–

   @ ÁP dụng :

   *** a * b +a * c =  a * ( b+ c)

   *** Nhân 1 số với 10 0

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