82×50= 820×25=
82×5= 82×250=
1040800 204089 204091 1040698
<<<
18×5005×180 256万2650000
1个周角2个平角 840÷20210÷5
380×60= 416×15= *804×32=
875÷25= 6200÷30= *737÷74=
①63×148=
②360×54=
③※207×30=
④408÷12=
⑤830÷41=
⑥※936÷71=