A. 25DAM + 42DAM = 67DAM83HM – 75HM = 8HM13KM⨯ 5 = 65KMB. 672M +...

Câu 2.a. 25dam + 42dam = 67dam83hm – 75hm = 8hm13km⨯ 5 = 65kmb. 672m + 314m = 986m475dm – 56dm = 419dm48cm : 6 = 8cm