Answered

69
Calcule les expressions suivantes.
R = (- 13 - 1) + (6 + 9) - (- 9 + 2)
S = 9 – (2 - 11) - 7 + 9 - (- 2 + 14)
T = [3 - (3 - 7)] - [9 - (2 - 5)]

Sagot :

R=-14+15-(-7)
=-14+15+7
=8
S=9-(-9)-7+9-12
=9+9-7+9-12
=8
T=3-(-4)-(9+3)
=3+4-9-3
=-5