1) Calcule o valor das expressões numéricas abaixo e resolva-as na folha seguinte:

a) 12 : 6 + 2 x 9 – 3 =___________________________________________________________________________

b) 9 x 9 + 18 : 3 – 8 =__________________________________________________________________________

c) 81 : 9 + 5 x 7 – 4 =__________________________________________________________________________

d) 32 x 15 – 240 : 12 =__________________________________________________________________________

e) 176 : 8 + 75 x 3 + 1 =__________________________________________________________________________

f) 66 : 3 + 9 x 3 – 10 =___________________________________________________________________________

g) 105 x 4 – 40 : 8 + 3 =___________________________________________________________________________

h) 192 : 2 – 47 x 2 + 4 =___________________________________________________________________________

i) 12 x 4 + 8 : 2 + 7 x 3 =__________________________________________________________________________

j) 36 + 2 x { 25 + [ 18 – ( 5 – 2 ) x 3 ] } =___________________________________________________________________________

k) { 230 – 3 x [ 24 – (25 – 13 ) : ( 5 + 1 ) ] – 24 : 3 } : ( 14 – 8) =_________________________________________________________________________

l) 226 : 2 – 9 x 8 + 2 =___________________________________________________________________________