Question

Tính nhanh :

12 x 85 + 35 x 182 - 35 x 94

Answer 1

   12 x 85 + 35 x 182 - 35 x 94

= 12 x (35 + 50) + 35 x 182 - 35 x 94

= 12 x 35 + 12 x 50 + 35 x 182 - 35 x 94

= (12 x 35 + 35 x 182 - 35 x 94) + 12 x 50

= 35 x ( 12 + 182 - 94) + 600

= 35 x 100 + 6x 100

= 100x (35 + 6)

= 100 x 41

= 4100