вычисли: 7дм 6см-52см +4дм 3см+ 1дм7см .5м- 1м 2дм +4м 7дм+2м5дм . 73дм-2м9дм +2м 4дм+17дм. 9дм-3дм 1см +2дм9см +5дм . 18дм+2м 3дм + 2м4дм -1м 9дм.
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