tolong dijawab dengan cara nya please

no 1. -124-80+146
= -204+146
=-58(b)
no2 .217+(-248)-252
=217-248-252
=-465-252
=-717(a)
no3.-140+38-(53-32)
= -140+38-21
= -102-21
=-123(c)
no4.-23-(148+(-133))+9
=-23-148-133+9
=-171-133+9
=-304+9
=-295(c)