300 + ______ = 700
____+ 500=700
500+600=1.100
670+ 329=999
345+256=601
____+ 250 = 873
677+___=873
______+ 400 = 700
200+____= 700
329+670=999
623+___=873
600+500=1.100
256+345=601
___+196=873
