> , < , = ? 45 cm … 27 cm + 18 cm 52 cm + 19 cm … 81 cm 40 cm … 81 cm - 37 cm
Giải thích
45 cm = 27 cm + 18 cm 52 cm + 19 cm > 81 cm
40 cm < 81 cm - 37 cm 72 cm - 39 cm > 16 cm
7 dm > 92 cm - 19 cm 41 cm - 8 cm < 4 dm
45 cm = 27 cm + 18 cm 52 cm + 19 cm > 81 cm
40 cm < 81 cm - 37 cm 72 cm - 39 cm > 16 cm
7 dm > 92 cm - 19 cm 41 cm - 8 cm < 4 dm