Question

a) (-12):(+4)+3.(-5)= b)15:{16:(4-4.3)-3}-5=

Answer 1

a) (-12):(+4)+3.(-5)=
-3+3.(-5)
-3-15= -18

b)15:{16:(4-4.3)-3}-5=
15:{16:(4-12)-3}-5
15:{16:(-8)-3}-5
15:{-2-3}-5
15:{-5}-5
-3-5= -8