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`---`
`\overline{1a26} + \overline{4b4} + \overline{57c}`
`= 1000 + \overline{a00} + 20 + 6 + 400 + \overline{b0} + 4 + 500 + 70 + c`
`= ( 1000 + 20 + 6 + 400 + 4 + 500 + 70 ) + ( \overline{a00} + \overline{b0} + c )`
`= 2000 + \overline{abc}`
`2000 + \overline{abc} = 2000 + \overline{abc} => \overline{1a26} + \overline{4b4} + \overline{57c} = 2000 + \overline{abc}`
Điền dấu `=`
`#dtkc`