Question

Efectueți mai intâi operatiile din paranteze : 

100+(1000-100):10=?
300+(300-30):30=?
5x(144:4)+640x2-978=?

150+230:10-(21x15-15):2=?
18x10:6-(200-20):9+81:9-2=?
202+202:202-202x(2-2)=?
(636:3-448:4+696:3+268:2):2x5=?

Answer 1

100+(1000-100):10=100+990:10=100+99=199
300+(300-30):30=300+270:30=300+9=309
5*(144:4)+640*2-978=5*36+1280-978=180+302=482
150+230:10-(21*15-15):2=150+23-(315-15):2=173-300:2=173-150=23
18x10:6-(200-20):9+81:9-2=180:6-180:9+9-2=30-20+7=17
202+202:202-202x(2-2)=202+1-202x0=203-0=203
(636:3-448:4+696:3+268:2):2x5=(212-112+232+134):10=466:10=46.6