calcureaza (21supra 10+1supra 2):6supra5+6supra 5-0,4​

Explicație pas cu pas:

(21/10+1/2) : 6/5 + 6/5 - 0,4 =

(21/10 + 5/10) • 5/6 + 6/5 - 4/10 =

26/10 • 5/6 + 6/5 - 2/5 =

26/12 + 4/5 =

13/6 + 4/5 =

13•5/30 + 4•6/30 =

65/30 + 24/30 =

89/30 =

2,9(6)

________

Răspuns:

Explicație pas cu pas:

(21/10+1/2):6/5+6/5-0,4

13/5×5/6+6/5-2/5

13×1/6+6/5-2/5

13/6+6/5-2/5

13/6+4/5

89/30

Sᴘᴇʀ ᴄᴀ ᴛᴇ-ᴀᴍ ᴀᴊᴜᴛᴀᴛ!