①2050800
=(2000000 )+( 50000)+(800 )
②76000900=
(70000000 )+ (6000000)+(900)
③
389000
=(300000 )+(80000)+(9000 )
1.
2050800=(2000000 )+( 50000)+(800 )
2.
76000900=(70000000 )+( 6000000)+( 900)
3.
389000=(300000 )+(80000 )+(9000 )
1.2000000+50000+800