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v3.20.1

Intangible assets, net | 12 Months Ended
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Dec. 31, 2019
Intangible assets, net |
Intangible assets, net | 13. Intangible assets, net The composition and movement of intangible assets is as follows:
|  | Useful |  | Gross value |  | Accumulated amortization |  | Net carrying amount
|  | life |  | At December 31,
|  | years |  | 2019 |  | 2018 |  | 2017 |  | 2019 |  | 2018 |  | 2017 |  | 2019 |  | 2018 |  | 2017
Software |  | 1 | – | 4 |  |  | Ps. | 579,360 |  | Ps. | 503,467 |  | Ps. | 441,803 |  | Ps. | (411,963) |  | Ps. | (324,343) |  | Ps. | (251,383) |  | Ps. | 167,397 |  | Ps. | 179,124 |  | Ps. | 190,420
Balance as of January 1, 2017 |  | Ps. | 114,041
Additions |  |  | 130,908
Disposals |  |  | (1,976)
Amortization |  |  | (52,396)
Exchange differences |  |  | (157)
Balance as of December 31, 2017 |  |  | 190,420
Additions |  |  | 71,007
Disposals |  |  | (9,368)
Amortization |  |  | (72,885)
Exchange differences |  |  | (50)
Balance as of December 31, 2018 |  |  | 179,124
Additions |  |  | 77,325
Disposals |  |  | —
Amortization |  |  | (87,667)
Exchange differences |  |  | (1,385)
Balance as of December 31, 2019 |  | Ps. | 167,397
Software amortization expense for the years ended December 31, 2019, 2018 and 2017 was Ps.87,667, Ps.72,885 and Ps.52,396, respectively. These amounts were recognized in depreciation and amortization in the consolidated statements of operations.

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- Definition The entire disclosure for intangible assets. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 38 -IssueDate 2019-01-01 -Section Disclosure -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=38&code=ifrs-tx-2019-en-r&doctype=Standard&dita_xref=IAS38_g118-128_TI -URIDate 2019-03-27 + Details
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