865 - 300 = (a)  

598 - 400 = (a)  

190 + 50 = (a)  

760 - 280 = (a)  

330 - 170 = (a)  

756 + 136 = (a)  

267 + 545 = (a)  

617 - 229= (a)  

700 - 463 = (a)  

Mike's dad buys him a Lego set with 450 pieces. Mike and his little sister lose 78 pieces. How many Legos do they have left?

(a)