Question

calcule em seu caderno o valor das expreções:

Answer 1

a)0,5.(-1,4+2,1)
   0,5.0,7
    =0,35

b)1/2+1/4.(-7/2)-5/4.(-1/8)
    1/2-7/8+5/32
    16/32-28/32+5/32
     =-7/32

c)(9/4+7/2)+(3/16.(-10)-7/2)
    23/4+(-3/8.5-7/2)
    23/4+(-15/8-7/2)
    23/4-43/8
    =3/8