Question

gente me ajudem nessas expressões fazer completa ²



67+{50×[70÷(27+8)+18÷2]+21}=

[30×(9-6)]+{30÷(9+6)]=

59-[20-(3×4-2)÷5]=

40+2×[20-(6+4×7)÷2]=

Answer 1

A)67+{50×[70÷(27+8)+18÷2]+21} =
67+{50×[70÷35+18÷2]+21}
67+{50×[2+9]+21}
67+{50×11+21}
67+{550+21}
67+571
=638

B)[30×(9-6)]+{30÷(9+6)} =
[30×3]+{30÷15}
90+2
=92

C)59-[20-(2×4-2)÷5] =
59-[20-(12-2)÷5]
59-[20-10÷5]
59-[20-2]
59-18
=41

D)40+2×[20-(6+4×7)÷2]
40+2×[20-(6+28)÷2]
40+2×[20-34-2]
40+2×[14-2]
40+2×12
40+24
=64