①160+594=
★②400﹣101=验算:
③109×8=
④220×5=
538+807= 740×3= 503×8= ★950-827=
189×6= 275+62= *570-380=
309×6= 720×5= *375-243=
913×8= 4×2800= *804-546=
342+258= 400-213=验算:
436×5= 305×6=
464×5= 397+476= ★1000-485=
408×6= 702-438= ★456+344=
748-352400 138+587700 492×63000