用多种方法计算下面各题.
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(1)12 ×4 |
12 ×4 |
12 ×4 |
12 ×4 |
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=______ |
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(2)18 ×2 |
18 ×2 |
18 ×2 |
18 ×2 |
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=______ |
=______ |
=______ |
=______ |
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=______ |
=______ |
=______ |
=______ |
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=______ |
=______ |
=______ |
=______ |
14
×6可以有多少种分拆?|
a )14×6 |
b)14 ×6 |
c)14 ×6 |
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