Question

ПОМОГИТЕ СРОЧНО !!!!!!

Answer 1

4.

1)3,46+(-2,63)+(-5,46)+2,63=3,46+(2,63-2,63)-5,46=

=3,46-5,46= -2

2)-7+(-18)+12+(-5)+9=(-7-5)-18+12+9=(-12+12)-18+9=

= -18+9= -9

3)-6,34+10,88+(-6,77)-(-6,34)=

=(-6,34+6,34)+10,88-6,77=

=10,88-6,77=4,11

5.

(-1,7+(-2,9))+(-4,2-(-3,8))=(-1,7-2,9)+(-4,2+3,8)=

= -4,6+(-0,4)= -4,6-0,4= -5

Ответ:-5