Question

[anna nguyễn]

Giai nhanh va dung giup e nhe :

Ap dung cac tinh chat cua phep cong va phep nhan de tinh nhanh :

  c)  25 . 5 . 4 . 27 . 2

Answer 1

[Ngọc Anh Dũng]

25 x 5 x 4 x 27 x 2

= ( 25 x 4 ) x ( 5 x 2 ) x 27

= 100 x 10 x 27 

= 1000 x 27

= 27000

Answer 2

[nghia]

25 . 5 . 4 . 27 . 2 = ( 25 . 4 ) . ( 5 . 2 ) . 27 = 100 . 10 . 27 = 1000 . 27 = 27000