`20,19 xx 65 + 34 xx 20,19 + 20,19`
`= 20,19 xx 65 + 34 xx 20,19 + 20,19 xx 1`
`= 20,19 xx ( 65 + 34 + 1)`
`= 20,19 xx 100`
`= 2019`
Đáp án: 2019
Giải thích các bước giải:
20,19 x 65 + 34 x 20,19 + 20,19
= 20,19 x 65 + 34 x 20,19 + 20,19 x 1
= 20,19 x ( 65 + 34 + 1 )
= 20,19 x 100
= 2019
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