Question

Resolva as expressões abaixo: a) 27+9.+(12×4-1) b) 3+12×6-4×5+12-6 c) (100÷5+2×10)+(8×10-15×4) d) {2+[2+(3×10-4×5÷2)-5×3]×3}

Answer 1

Resposta:

a)83

b)73

c)60

d)23

a) 27+9+(48-1)

27+9+47=83

b) 3+12×6-4×5+12-6

3+72-20+12-6=73

c) (100÷5+2×10) + (8×10-15×4)

(20+20)+(80-60)

40+20=60

d) {2+[2+(3×10-4×5÷2)-5×3]×3}

{2+[2+(30-20÷2)-15] ×3}

{2+[2+20-15]×3}

{2+7×3}

{2+21}=23