Sagot :
1) R= 9-(-5)-(-6)
= 9+5+(-6)
=8
S= 9+(-5)-7
= 9-5-7
= -3
T = 7-(-6)-9
= 7+6-9
= 4
V= 8+(-3) +4
= 8-3+4
= 9
2) A=-7+5x(-6)
=7-30
= -23
B=(-7+5) x(-6)
= -2x(-6)
= 12
C=4x8-(-9)
= 32 + 9
= 41
D=4x(8-(-9))
=4x 17
= 68
= 9+5+(-6)
=8
S= 9+(-5)-7
= 9-5-7
= -3
T = 7-(-6)-9
= 7+6-9
= 4
V= 8+(-3) +4
= 8-3+4
= 9
2) A=-7+5x(-6)
=7-30
= -23
B=(-7+5) x(-6)
= -2x(-6)
= 12
C=4x8-(-9)
= 32 + 9
= 41
D=4x(8-(-9))
=4x 17
= 68