TOLONG JAWAB DENGAN BENAR​

sifat assosiatif=r+(p+q)=(r+p)+q

a)(-15+(-13))+23=-15+(-13+23)=-15+10=-5

b)40+(-30+56)=(40+(-30))+56=10+56=66

c)(-27+14)+16=-27+(14+16)=27+30=57

d)35+(-15+23)=(35+(-15))+23=20+23=43

e)20+(-70+49)=(20+(-70))+49=-50+49=-1

f)(45x(-20))x5=45x(-20×5)=45x(-100)=-4500

g)50x(-20x21)=(50x(-20))x21=-1000×21=-21000

h)(-25)x(-40×11)=((-25)x(-40))x11=1000×11=-11000

i)-20x(5×32)=((-20)x5)x32=-100×32=-3200

j)(-25)x((-4))x17=((-25)x(-4)x17)=100×17=1700