1) Simplifique as expressões numéricas: like

a) 9 + 3 . 2 =

b) 8 . 7 –18 =

c) 6 . 12 + 6 . 8 =

d) 9 . 15 –6 .15 =

e) 8 . 3 –20 + 4 . 2 =

f) 100 –3 . 24 =

g) 256 –2 . 72 –2 . 36 =

h) 9 . 7 –7 . 9 + 1 =

i) 40 . 8 : 2 =