5. Another reason -- besides their sheer length -- for abbreviating the Ten Commandments is that they contain a lot of historical material that is simply not directly applicable to modern Gentile Christians. Thus God tells the ancient, Jewish audience that he is the Lord, "who brought you out of the land of Egypt, out of the house of bondage" (Ex. 20:2), that they must honor (lit., "glorify") their parents so "that your days may be long in the land which the LORD your God gives you" (Ex. 20:12), and that "You shall remember that you were a servant in the land of Egypt, and the LORD your God brought you out thence with a mighty hand and an outstretched arm; therefore the LORD your God commanded you to keep the sabbath day" (Deut. 5:15). Besides these, there are also numerous cultural-historical references which no longer apply to the overwhelming majority of Christians today -- such as having male and female slaves, cities with gates and walls, oxen, asses, and fields -- while they did apply to what might be called "the Hebrew middle class" in ancient Palestine.
6. Finally, the fact the Church is not trying to "hide" or "remove" any of Ten Commandments by abbreviating them in the memorization formula is indicated by the fact that everywhere else the Church uses them in unabbreviated form.
They are there, in all their unabbreviated glory, in every Catholic Bible, including the Vulgate, which was used for a thousand years before the Protestant Reformation, as well as in all the vernacular translations of Scripture before and since the appearance of Protestantism.
They are read out unabbreviated during the Scripture readings at Mass (and always have been).
And, finally, when catechetics is done and people are taught the Ten Commandments, they are always read and shown the unabbreviated form before being asked to learn the memorization formula.
In short, there is simply no basis whatsoever to the charge that the Church is trying to "hide" or "remove" any of the Ten Commandments. Rather, the Church is trying to make them easier to memorize and thus help people learn and internalize them better. One may well ask in which communion an average, catechized person is more likely to know the Ten Commandments by heart. Is a catechized Catholic more likely to be able to name the commandments in order, or is a average, catechized Protestant more likely to be able to name them in order? Which communion really stresses the Ten Commandments more in its catechesis? The group that says it is a mortal sin to violate them or the group that is more prone to say, "That is just Old Testament. Today we have grace"?