Tính a) 25dam + 42dam = dam 83hm – 75hm = hm 13km x 5 = km
Giải thích
a) 25dam + 42dam = 67dam
83hm – 75hm = 8hm
13km x 5 = 65km
b) 672m + 314m = 986m
475dm – 56dm = 419dm
48cm : 6 = 8cm
a) 25dam + 42dam = 67dam
83hm – 75hm = 8hm
13km x 5 = 65km
b) 672m + 314m = 986m
475dm – 56dm = 419dm
48cm : 6 = 8cm