三 因數(shù)和倍數(shù)
因數(shù)和倍數(shù)的認(rèn)識(shí)
1: ⑴倍數(shù) 因數(shù)
⑵ 因數(shù) 倍數(shù)
⑶因數(shù) 倍數(shù)
⑷倍數(shù) 因數(shù)
⑸因數(shù) 倍數(shù)
2: 3 的倍數(shù) 3 6 12 15 18 24
27 30 33 36 39 45
5的倍數(shù) 5 1015 20 25 30 35 40 45
既是3的倍數(shù),又是5的倍數(shù) 15 30 45
3: ⑴1 2 3 5 6 10 15 30
⑵ 1 2 4 5 10 |