200+ 100: 5+ 30- 70= 200+ 20+ 30- 70= 220+ 30- 70= 250- 70= 180.
200 + 100 : 5 + 30 - 70
= 200 + 20 + 30 - 70
= 220 + 30 - 70
= 250 - 70
= 180
Quá dễ!
200 + 100 : 5 + 30 - 70
=200 + 20 + 30 - 70
=200+ 50 - 70
=250 - 70
=180
200 + 100 : 5 + 30 - 70
= 200 + 20 + 30 - 70
= 220 + 20 - 70
= 250 - 70
= 180
200 + 100 : 5 + 30 - 70
= 200 + 20 - 30 - 70
= 220 + 30 - 70
= 250 - 70
= 180
200 + 20 + 30 - 70
= 220+30-70
=250- 70
=180
200 + 100 : 5 + 30 - 70
= 200 + 20 + 30 - 70
= 220 + 30 - 70
= 250 - 70
= 180
200+100:5+30-70=200+20+30-70
250-70=180
200 + 100 : 5 + 30 - 70
= 200 + 20 + 30 - 70
= 220 + 30 - 70
= 250 - 70
= 180