Question

Resuelve las siguientes operaciones
38. - (-4) + 5 - {2-[4-(-7) + 10]}
39.[4 - 5- (-9)] + 5[4(3-2)]
40.-[11 + 42 = 7 - (3.2 - 7)] - (-12-7
)​

Answer 1

Explicación paso a paso:

38- (-4)+5 -{2-[4-(-7)+10]} =

38 - 1 - 2 - 11 + 10 =

37 - 2 - 21 =

39 - 21 = 18

39•[4-5-(-9)]+5[4(3-2)] =

39• -1 - -4 + 4 + 1 =

-39 - 0 + 1 =

-39 + 1 = -38

40•-[11+42 -7-(3•2-7)]-(-12-7) =

40 • 31 - 7 - -1 - -19 =

1240 - 8 - -19 =

1232 - -19 = 1251