52м 48см+6м20см=58м 68см;
<span><span>3</span></span><span><span>м8дм+15м2дм=18м 10дм = 19м;</span></span>
<span><span /><span>1м-6дм= 4дм;</span></span>
<span><span /><span>1м-2дм7см=7дм 3см;</span></span>
<span><span /><span>4м-1м8см= 2м 92см;</span></span>
<span><span /><span>28дм+72дм=100дм = 10м;</span></span>
<span><span /><span>64дм8см-53дм6см= 11дм 2см;</span></span>
<span><span /><span>3дм2см-1дм9см= 1дм 3см;</span></span>
<span><span /><span>63м/9= 7м;</span></span>