การบ้าน
ให้นักเรียนตอบคำถามดังต่อไปนี้
1. 3 + 5 =......................
2. 5 + 4 =......................
3. 5 + 5 =......................
4. 6 + 3 =......................
5. 4 + 4 =......................
6. 7 + 4 - 2 =.................
7. 15 + 20 =..................
8. 35 + 56 =..................
9. 65 -23 =.....................
10.89 - 45 =....................
1. 3 + 5 = 8
2. 5 + 4 = 9
3. 5 + 5 = 10
4. 6 + 3 = 9
5. 4 + 4 = 8
6. 7 + 4 - 2 = 9
7. 15 + 20 = 35
8. 35 + 56 = 91
9. 65 -23 = 42
10.89 - 45 = 44