Question

7) -5(2– 3)– 7(4-2)

8) 7(3– 5)– 9(2-7);

9) -8(4– 5)+ 7(8– 4);

 

10) –2(5-7)+4(5- 3).

Answer 1

10: =-10+14+20-12

=4+8

=12

8: =21-35-18+63

=3+28

=31

Answer 2

7)=-5.(-1)-7.2

=5-14

=-9

8)=7.(-2) - 9.(-5)

= -14-(-45)

=31

9)= -8.(-1)+7.4

=8+28

=36

10)= -2.(-2)+4.2

=4+8

=12