Bài 1:Viết {theo mẫu}
Mẫu a,3745m=3km 745m=3,745km Mẫu b,7426g=7kg 426g=7,426kg
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4075m=.......km....m=....,.....km 5065kg=...tấn...kg=...,...tấn
901m=......km.....m=...,....km 65dm=...m...dm=...,...m
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