下面每组数中,谁是谁的倍数?谁是谁的因数?
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(1)14 和42________ |
(2)13 和65________ |
下面每组数中,谁是谁的倍数?谁是谁的因数?
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(1)27 和9________ |
(2)18 和72________ |
用多种方法计算.
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18 ×2 |
18 ×2 |
18 ×2 |
18 ×2 |
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=_______ |
=_______ |
=_______ |
=_______ |
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=_______ |
=_______ |
=_______ |
=_______ |
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=_______ |
=_______ |
=_______ |
=_______ |