Question

Calculati:
a. (+5)+(+3) ;
b. (+4)+(-2) ;
c. (-6)+(-1);
d. (-6)+0;
e. (-10)+(-30)
f.(-15)+(-5)
g.(+17)+(-10)
h.(+2)+(-1)
i.(+7)+(-7)
j.(-7)+(+4)
k.(+15)+(-10)
l.(-20)+(+10)

Answer 1

Salut !

a) ( + 5) + ( + 3 ) = + 5 + 3 = + 8 = 8

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

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

d) ( - 6 ) + 0 = - 6 + 0 = - 6

e) ( - 10 ) + ( - 30 ) = - 10 - 30 = - 40

f)  ( - 15 ) + ( - 5 ) = - 15 - 5= - 20

g) ( + 17 ) + ( - 10 ) = + 17 - 10 = + 7 = 7

h) ( + 2 ) + ( - 1 ) = + 2 - 1= + 1= 1

i) ( + 7 ) + ( - 7 ) = + 7 - 7 = 0

j) ( - 7 ) + ( + 4 ) = - 7 + 4 = - 3

k) ( + 15 ) + ( - 10 ) = + 15 - 10 = + 5 = 5

l) ( - 20 ) + ( + 10 ) = - 20 + 10 = - 10

Am calculat după regulile :

1 -> ( + ) + ( + ) = +

2 -> ( + ) + ( - ) = -

3 -> ( - ) + ( + ) = -

4 -> ( - ) + ( - ) = +