1)5/7×(-0,54)=5/7×(-54/100)=270/700= -27/70
2)1,56×5/7=1 56/100×5/7=156/100×5/7=780/700=1 80/700=1 8/70
3)-27/70-1 8/70= -27/70-78/70=-(78/70+27/70)=-105/70=-1 35/70= -1 5/10
1)5/7×(-0,54)=5/7×(-54/100)=270/700= -27/70
2)1,56×5/7=1 56/100×5/7=156/100×5/7=780/700=1 80/700=1 8/70
3)-27/70-1 8/70= -27/70-78/70=-(78/70+27/70)=-105/70=-1 35/70= -1 5/10