Question

5 – 10 + 15 – 20 + 25 -30 + 35 – 40 + 45 – 50 + 55

Answer 1

5 - 10 + 15 - 20 + 25 - 30 + 35 - 40 + 45 - 50 + 55

= -5 + -5 + -5 + -5 + -5 + 55

= -25 + 55

= 30

Answer 2

= 30 nha bạn

Answer 3

30 !!!

Answer 4

30 !!!!!

Answer 5

= 30 nha bn !! k mk nha!!

Answer 6

Bằng 30 là đúng đó

Answer 7

5-10+15-20+25-30+35-40+45-50+55

= (55-50)+(45-40)+(35-30)+(25-20)+(15-10)+5

= 5 + 5 + 5 + 5 +5 + 5

= 5 x 6 = 30