Question

4(10:2-7:l-7l)-5 (-5):2

3(-5:5-4)-l-3l(-5)

-2(-3+l-8l:2-7) -5l-4l

Answer 1

4(10:2-7:l-7l)-5 (-5):2

=4.(5-1)-5.(-5):2

=4.4-5.(-5):2

=16+25:2

=16+12,5

=28,5

3(-5:5-4)-l-3l(-5)

=3.(-1-4)-3.(-5)

=3.(-5)-3.(-5)

=-5.(3-3)

=-5.0

=0

-2(-3+l-8l:2-7) -5l-4l

=-2(-3+4-7)-5.4

=-2.-6-5.4

=12-20

=-8

Answer 2

4.(10:2 - 7:|-7|) - 5.(-5):2
= 4.(5 - 7:7) + 25:2 
= 4.(5 - 1) + 12,5
= 4.4 + 12,5
= 16 + 12,5
= 28,5
3.(-5:5 - 4) - |-3|.(-5)
= 3.(-1 - 4) - 3.(-5)
= 3.(-5) - 3.(-5)
= -15 + 15
= 0
-2.(-3 + |-8|:2 - 7) - 5.|-4|
= -2.(-3 + 8:2 - 7) - 5.4
= -2.(-3 + 4 - 7) - 20
= -2.(1 - 7) - 20
= -2.(-6) - 20
= -12 - 20
= -8