Question

Помогите.Спасибо заранее.497,498.

Answer 1

- 4 - 3 - 2 - 1 + 0 +1 + 2 =  -10 + 3 = - 7

Answer 2

(5.31+2.69)+(-9.65-4.35)
8+(-14)
8-14
-6

Answer 3

&497
(-4)+(-3)+(-2)+(-1)+0+1+2+=-10+3=-7