Are Mormons “Bible-believing” Christians?
Some members of other Christian denominations do not consider Mormons Christians, because they have added to the body of scripture. Mormons are indeed Christians. As it says in the Book of Mormon…
And we talk of Christ, we rejoice in Christ, we preach of Christ, we prophesy of Christ, and we write according to our prophecies, that our children may know to what source they may look for a remission of their sins (2 Nephi 25:26).
And in the Pearl of Great Price…
Wherefore teach it unto your children, that all men, everywhere, must repent, or they can in nowise inherit the kingdom of God, for no unclean thing can dwell there, or dwell in his presence; for, in the language of Adam, Man of Holiness is his name, and the name of his Only Begotten is the Son of Man, even Jesus Christ, a righteous judge, who shall come in the meridian of time (Moses 6:57).
And in the Doctrine and Covenants…
The rise of the Church of Christ in these last days, being one thousand eight hundred and thirty years since the coming of our Lord and Savior Jesus Christ in the flesh, it being regularly organized and established agreeable to the laws of our country, by the will and commandments of God, in the fourth month, and on the sixth day of the month which is called April—
The Latter-day Saints have a great reverence and love for the Bible. They study it and try to live its teachings. They treasure its witness of the life and mission of the Lord Jesus Christ. The Prophet Joseph Smith studied the Bible all his life, and he taught its precepts. He testified that a person who can “mark the power of Omnipotence, inscribed upon the heavens, can also see God’s own handwriting in the sacred volume: and he who reads it oftenest will like it best, and he who is acquainted with it, will know the hand [of the Lord] wherever he can see it” (Teachings of the Prophet Joseph Smith, 56).
The Latter-day Saint edition of the combined scriptures
In 1979 the Church published a new edition of the combined scriptures. This work, guided by the General Authorities from its beginnings, represents an important achievement that has resulted in scriptural editions more easily read and understood than any editions yet published in this dispensation.
The need for a Latter-day Saint edition of the Bible came from an abundance of Bibles rather than a lack of them. Since the early 1920s the official missionary editions of the Bible had been published by Deseret Book Company through special arrangements with Cambridge University Press. President Heber J. Grant and Elder James E. Talmage made arrangements for the Church to use the Cambridge King James Version, with the addition of Elder Talmage’s “Ready References,” between the Old and New Testaments.
During the 1950s and 1960s the Department of Seminaries and Institutes of Religion published editions of the standard works for students. At the same time the Primary Association produced its own large-print, inexpensive edition of the King James Bible which contained no study aids. Bookcraft Publishers produced a King James Version that included notes and commentary by Elder Milton R. Hunter.
Like the new LDS edition, all these editions were the King James Version. The text of each was the familiar King James translation, but they were vastly different in their study aids and explanatory materials. Yet all were being used in Church curricula.
During 1971 a research paper by Grant Barton focused the attention of the General Authorities on the need for a unified Latter-day Saint edition of the King James Bible. The paper noted the confusion of having a Primary student use one edition of the Bible, asking him to use another style in seminary, and then providing him with a third for his mission.
Another important factor which focused the attention of the Brethren on the need for a unified Bible and an improved Triple Combination (the Book of Mormon, Doctrine and Covenants, and Pearl of Great Price) was the decision to center the Church’s adult curriculum on the four standard works, using the scriptures themselves as student manuals. This curriculum program began in 1972.
These and other issues were carefully studied by the former Church Internal Communications Department, which planned and prepared Church curricula. The managing director of the department, J. Thomas Fyans (who has since become a General Authority), received permission from President Joseph Fielding Smith to recommend what might be done with the standard works. Brother Fyans and his associates began the unified effort to produce one Latter-day Saint edition of the King James Version and to improve study aids in the Triple Combination. 
The most talented scholars in the Church, the General Authorities of the Church, and the Cambridge University Press joined forces to create the new edition of the Standard Works (combined scriptures) of the Church. No text in any of the scriptures was changed. However, a new system of footnotes was devised, and careful cross-referencing was done. The work included complex indexing and added appendices.