Matemática - 7 ano: Expressões Numéricas

1) Calcule as Expressões:

a) 7 – ( 1 + 3) =

b) 9 – ( 5 – 1 + 2) =

c) 10 – ( 2 + 5 ) + 4 =

d) ( 13 – 7 ) + 8 – 1 =

e) 15 – ( 3 + 2) – 6 =

f) ( 10 – 4 ) – ( 9 -8) + 3 =

g) 50 – [ 37 – ( 15 – 8 ) ] =

h) 28 + [50 – (24 – 2) -10 ] =

i) 20 + [ 13 + (10 – 6) + 4] =

j) 52 – { 12 + [ 15 – ( 8 – 4)]} =

l) 25 + { 12 + [ 2 – ( 8 – 6 ) + 2 ]} =

m) { [ ( 18 – 3 ) + ( 7 + 5) – 2 ] + 5 } – 12 =

n) 65 – { 30 – [ 20 – ( 10 – 1 + 6) + 1 ]} =

o)45 + { 15 – [ ( 10 – 8 ) + ( 7 – 4) – 3 ] – 4 } =

p) 40 + { 50 – [35 – ( 25 +5) – 1 ]} + 7 =

q)38 – { 20 – [ 22 – ( 5 + 3) + ( 7 – 4 +1)]} =

r) 26 + { 12 – [ ( 30 – 18) + ( 4 – 1) – 6 ] – 1 } =

s) 25-[10 + (7 - 4)] =

t) 32+ [10-(9-4)+8] =

u)45-[12-4+(2+1)] =

v)70-{20-[10-(5-1)]} =

x) 28 + {13 - [6 -(4 + 1) + 2] - 1 } =

z) 53-{20-[30-(15-1+6) + 2 ]} =