17.(-84)=17.(-16) 15.58-15.48
=17.[(-84)+(-16)] =15.(58-48)
=17.[-(84+16) =15.10
=17.(-100) =150
=-1700
-37.86+37.76 1975.(-115)+1975.15
=[-37+37].86+76 =1975.[(-115)+15]
=0.86+76 =1975.100
=0+76 =197500
=76
17.(-84)+17.(-16)
=17.\(\left[\left(-84\right)+\left(-16\right)\right]\)
=17.(-100)
=-1700
b.15.(58)-15.(48)
=15.(58-48)
=15.10=150
c.-37.(86)+37.76
=-37+37.(86+76)
=-1.162
=-162
d.1975.(-115)+1975.15
=1975.(-115+15)
=19750
