Question

Exercitiul 15 va rog cat mai repede​

Answer 1

4+(-2)+(-4)=

4-2-4=

2-4=

-2

5+(-4)+(-6)+9=

5-4-6+9=

1-6+9=

-5+9=

4

7+(-6)+(-1)+8+(-8)=

7-6-1+8-8=

1-1+8-8=

0+0=

0

-8-(-6)-(-2)=

-8+6+2=

-2+2=

0

5+(-7)-(-4)-(-4)=

5-7+4+4=

-2+4+4=

2+4=

6

3+(-2)+(-4+3)=

3-2-4+3=

1-1=

0

Answer 2

Răspuns:

a) 4+(-2)+(-4)=

=4-2-4

=+2-4

=-2

b) 5+(-4)+(-6)+9=

=5-4-6+9

=+1-6+9

=-5+9=+4

c) 7+(-6) +(-1)+8+(-8)=

=7-6-1+8-8

=+1-1+8-8

=0+8-8=0

d)-8-(-6)-(-2)=

=-8+6+2

=-2+2=0

e)5+(-7)-(-4)-(-4)=

=5-7+4+4

=-2+4+4

=+2+4

=+6

f) 3+(-2)+(-4+3)

=3-2-1

=+1-1=0