Viết (theo mẫu)
a) Mẫu: 8679 = 8000 + 600 + 70 + 9
9217 = ......................................
4538 = ......................................
7789 = ......................................
9696 = ......................................
5555 = ......................................
6574 = ......................................
b) Mẫu: 2004 = 2000 + 4
2005 = ......................................
9400 = ......................................
2010 = ......................................
1909 = ......................................
3670 = ......................................
2020 = ......................................
a) Mẫu: 8679 = 8000 + 600 + 70 + 9
9217 = 9000 + 200 + 10 + 7
4538 = 4000 + 500 + 30 + 8
7789 = 7000 + 700 + 80 + 9
9696 = 9000 + 600 + 90 + 9
5555 = 5000 + 500 + 50 + 5
6574 = 6000 + 500 + 70 + 4
b) Mẫu: 2004 = 2000 + 4
2005 = 2000 + 5
9400 = 9000 + 400
2010 = 2000 + 10
1909 = 1000 + 900 + 9
3670 = 3000 + 600 + 70
2020 = 2000 + 20
