Bài 1 (trang 44 SGK Toán 3): Số
| Đề bài | Hướng dẫn giải |
| 1hm = …m 1 m = …dm 1 dam = …m 1 m = …cm 1hm = …dam 1cm = …mm 1km = …m 1m = ….mm | 1hm = 100m 1 m = 10dm 1 dam = 10m 1 m = 100cm 1hm = 10dam 1cm = 10mm 1km = 1000m 1m = 1000mm |
Bài 2
| b) 7 dam = 70 m | 7hm = 700m |
| 9 dam = 90m | 9hm = 900m |
| 6 dam = 60m | 5hm = 500m |
Bài 3 (trang 44 SGK Toán 3):
Tính theo mẫu:
| Đề bài | Hướng dẫn giải |
| 25dam + 50dam = 8dam + 12dam = 36dam + 18dam = 24dam – 10dam = 14dam 45dam – 16dam = 67 dam – 25dam = 72dam – 48dam = | 25dam + 50dam = 75dam 8dam + 12dam = 20dam 36dam + 18dam = 54dam 45dam – 16dam = 29dam 67 dam – 25dam = 42dam 72dam – 48dam = 24dam. |
huong dan giai bai tap toan lop 3 de ca met hec to met
huong dan giai bai tap toan lop 3 de ca met hec to met