Question

Tính nhanh:

320,80 - 309,87 - 3,80

Answer 1

320,80 - 309,87 - 3,80

= (320,8 - 3,8) - 309,87

= 317 - 309,87

= 7,13

bạn nhớ : 320,8 = 320,80 và 3,8 = 3,80

Answer 2

320,80 - 309,87 - 3,80

= ( 320,80 - 3,80 ) - 309,87

= 317 - 309,87

= 7,13

At the speed of light

Answer 3

= 320,80 - 3,80 - 309,87

= 317 - 309,87

= 7,13

Answer 4

320,80 - 309,87 - 3,80

= ( 320,80 - 3,80) - 309,87

= 317 - 309,87

= 7,13 

At the speed of light