①308×70=
②80×450=
③230×63=
④72×648=
⑤225×36=
⑥790×80=
68×168= 604×26= 580×70=
105×25= 252×34= 199×80= 331×17=
182×25= 83×302= 740×60=
358×69= 15×609= 28×760=
235×24 504×47
56×253= 803×58= 40×680= 33×550=