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Cri76
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100cm-964mm+24cm=?mm; 72dm-450mm+249cm=?cm; 1m-1dm-1c--1mm=?mm; 1mm+10cm+229mm-187mm=?mm; 74 dam +1km+500m=?dam; 4km+2hm+15dam+279m=?m; 116km+2400dam-840hm+2000m=?dam ; 68000.+27500hm+4800dam-1998km=km