Tolong di jwb ya beserta caranya

1.28×25-(46+235+154)
= 700-437
=263
2.(23×31)+(14×16×5)-(31×2)
= 713+1120-62
= 1771
3.(2.688÷16)×(-8)
= 168×(-8)
= -1344
4.(5.129-3.215)÷-6×16
= (1914 : -6)×16
= -319×16
= -5104

Pake kalkulator………..