Question

Tính giá trị biểu thức

A= (0,87+0,64).(1,25.7+\(\dfrac{4}{5}\).1,25)+31,64

Answer 1

A = (0,87 + 0,64) . (1,25 . 7 + \(\dfrac{4}{5}\) . 1,25) + 31,64

A = 1,51 . [1,25 . (7 + \(\dfrac{4}{5}\))] + 31,64

A = 1,51 . (1,25 . 7,8) + 31,64

A = 1,51 . 9,75 + 31,64

A = 14,7225 + 31,64

A = 46,3625

A = \(\dfrac{3709}{80}\)

Answer 2

A= (0,87+0,64).(1,25.7+\(\dfrac{4}{5}\).1,25)+31,64

= 1,51.(1,25.(7+\(\dfrac{4}{5}\)))+31.64

= 1,51.(1,25.\(\dfrac{39}{5}\))+31.64

= 1,51.\(\dfrac{39}{4}\)+31.64

= \(\dfrac{5889}{400}\)+31,64

= 46,3625