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| 2006 年 4 月 9 日 星期日 |
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| math |
p.106
4a.
[2x7x2]+[15x7x2]+[2x15x2]
=28+210+6
=298[cm2]
2x7x15
=210[cm3]
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4b.
[12x5÷2x2]+[26x12]+[13x26]+[5x26]
=60+312+338+130
=840[cm2]
[5x12÷2]x26
=30x26
=780[cm3]
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p.107
8a.
[18x12x2]+[23x12x2]+[18x23x2]
=432+552+828
=1812[cm3]
8b.
23x18x12
=4968[cm3]
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p.111
2a.
7.5x10
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| 刊登時間︰2006-04-09 09:05 PM [ 編輯日誌 ] [ 分享至FACEBOOK ] |
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