Question

ACTIVIDAD II Efectúa las operaciones con paréntesis siguientes.
1. (-640) – [(-75) + (-12)] = __________
2. (+95) – [(-840) + (+275)] = __________
3. [(+105) + (270)] – (-750) = __________
4. (-150) + [(-18) - (-75)] = __________
5. (+75) – [(-40) + (-15)] = __________
6. 125 – 79 + (58 – 36 + 12) = __________
7. -75 + 49 + (-125 +15 + 70) = __________
8. [(-16) + ((+15) – (-3))] = __________

Answer 1

Respuesta:

(-640) - [(-75) + (-12)]

-640 - [-75 - 12]

-640 - [-87]

-640 + 87 = -553

(+95) - [(-840) + (+275)]

95 - [-840 + 275]

95 - [-565]

95 + 565 = 660

[(+105) + (270)] - (-750)

105 + 270 + 750 = 1125

(-150) + [(-18) - (-75)]

-150 + [-18 + 75]

-150 + [57]

-150 + 57 = - 48

(+75) - [(-40) + (-15)]

75 - [-40 - 15]

75 - [-55]

75 + 55 = 130

125 - 79 + (58 - 36 + 12)

46 + (22 + 12)

46 + 34 = 80

-75 + 49 + (-125 + 15 + 70)

- 26 + ( - 125 + 85)

-26 + ( - 40)

-26 - 40 = - 66

[(-16) + ((+15) - (-3))]

[-16 + (15 + 3)]

[-16 + 18] = 2