Question

Calculati
a)46:23+{78-3x[(15+7x5):5]-3x7}
b)1+2x{3+4:[5-6:(7-8:(9-1))]}

Answer 1

a) 46:23+{78-3x[(15+7x5):5]-3x7} =
=2+{78-3x[(15+35):5]-21} =
=2+[78-3x(50:5)-21] =
=2+(57-3x10) =
=2+57-30 =
=59-30=29

b)1+2x{3+4:[5-6:(7-8:(9-1))]}=
=1+2x{3+4:[5-6:(7-8:8))]}=
=1+2x{3+4:[5-6:(7-1))]}=
=1+2x[3+4:(5-6:6)]=
=1+2x[3+4:(5-1)]=
=1+2x(3+4:4)=
=1+2x(3+1)=
=1+8=9