Question

Ejercicios suma y resta combinada 1° 20+{-8+[4-2-(5+7-1)]-4} 2° {-3+[-2+(4-2)-(-7-3]+8}-5+(3-2)

Answer 1

20+{-8+[4-2-(5+7-1)]-4}

20+{-8+[2 -(12-1)]-4}

20+{-8+[2 -11 ]-4}

20+{-8+2 -11 - 4}

20 + {-23+2}

20 + {-21}

20- 21

-1


{-3+[-2+(4-2)-(-7-3]+8}-5+(3-2)

{-3+[-2+(2)-(-10) ]+8}-5+(+1)

{-3+[-2+ 2 +10 ]+8 } -5+1

{ - 3 +[10] +8 ] -4

{ -3 +10 +8 ] -4

15 -4

11