Tính: 3,125 + 2,075 x 2

3,125 + 2,075 x 2

= 3,125 + 4,15 = 7,275

Hoặc

3,125 + 2,075 x 2

= 3,125 + 2,075+ 2,075

 

=5,2 + 2,075

= 7,275 .