Tính a. 4km + 17 dam b. 8hm + 5m c. 19 m + 42 cm
Giải thích
a. 4km + 17 dam = 400 dam + 17 dam = 417 dam
b. 8hm + 5m = 800 m + 5m = 805 m
c. 19 m + 42 cm = 1900 cm + 42 cm = 1942 cm
d. 8m 3 cm + 7 dm = 800 cm + 3 cm + 70 cm = 873 cm
a. 4km + 17 dam = 400 dam + 17 dam = 417 dam
b. 8hm + 5m = 800 m + 5m = 805 m
c. 19 m + 42 cm = 1900 cm + 42 cm = 1942 cm
d. 8m 3 cm + 7 dm = 800 cm + 3 cm + 70 cm = 873 cm