PEINDADIA28
Answered

16 Effectue les additions suivantes.
a. A = ( - 11) + (- 9)
c. C = (+ 1) + (+ 3) + (-2)
b. B = (+ 12) + (-15)
d. D = (-10,8) + (+ 2,5)
e. E = (+ 25,2) + (- 15,3)
f. F = (- 21,15) + (+ 21,15)
Merci d’avance

Sagot :

CHRYSTINE

bonsoir

A = ( - 11) + (- 9)

=-11-9=-20

C = (+ 1) + (+ 3) + (-2)

=1+3-2=2

B = (+ 12) + (-15)

=12-15=-3

D = (-10,8) + (+ 2,5)

=-10.8+2.5=-8.3

E = (+ 25,2) + (- 15,3)

=25.2-15.3=9.9

F = (- 21,15) + (+ 21,15)

=-21.15+21.15=0