25×90+4500÷(-9)+(-16)×60

(25x90)+( 4.500:(-9) + (( -16)x60 )
= 2.250 + ( -500 ) + ( -960 )
= 2.250 - 500 - 960
= 1.750 - 960
= 790

(25×90)+4500÷(-9)+(-16)×60
2250+{4500÷(-9)}+(-16)×60
2250-500+{(-16)×60}
2250-500-960
2250-1460
= 790