Bài Làm:
1.
a) 468 + 379 = 847 379 + 468 = 847 |
b) 6509 + 2876 = 9385 2876 + 6509 = 9385 |
c) 4268 + 76 = 4344 76 + 4268 = 4344 |
2.
a) 48 + 12 = 12 + 48 65 + 297 = 297. + 65 177 + 89 = 89 + 177 |
b) m + n = n + m 84 + 0 = 0 + 84 a + 0 = 0 + a = a |
3.
3717 + 1202 < 4717 + 1202
3717 + 1202 = 3717 + 1022
1202 + 3717 = 3717 + 1202