2000:100×1=20
2000:100×3=60
2000:100×5=100
3600:100×1=36
3600:100×3=108
3600:100×5=180
1))2000 : 100 × 1 = 20
2))2000 : 100 × 3 = 60
3))2000 : 100 × 5 = 100
4))3600 : 100 × 1 = 36
5))3600 : 100 × 3 = 108
6))3600 : 100 × 5 = 180
