Question

 

 

 

Tinh nhanh: 2.21.18+12.9+76.36

32.27+154.69+73.32-69.54

Answer 1

\(2.21.18+12.9+76.36\)

\(=36.21+36.3+76.36\)

\(=36.\left(21+3+76\right)\)

\(=36.100=3600\)

Answer 2

b)  \(32.27+154.69+73.32-69.54\)

\(=32.\left(27+73\right)+69.\left(154-54\right)\)

\(=32.100+69.100\)

\(=100.\left(32+69\right)\)

\(=100.101=10100\)