點計3/10+ 3/4 and 2/7 +3/4

🎓 學業台小學及中學教育

WongTin Yan

2011-09-08 4:14 am

點計3/10+ 3/4 and 2/7 +3/4 thanks

回答 (3)

sugar .v.

2011-09-08 4:23 am

✔ 最佳答案

3/10 + 3/4
= 3x2/10x2 + 3x5/4x5
=6/20 + 15/20
=21/20
=1 1/20

2/7 + 3/4
=2x4/7x4 + 3x7/4x7
=8/28 + 21/28
=29/28
=1 1/28

Hope can help you :D

參考: me

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[匿名]

2011-09-08 5:09 am

呢D係咪小學4年級既數黎-.-

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Sze Yuen

2011-09-08 4:28 am

Hi,

首先要通份母:

3/10 + 3/4

= 6/20 + 15/20 (10 和 4 的通份母是:20) (L.C.M)

= 21/20

= 1 1/20

2/7 + 3/4

= 8/28 + 21/28

= 29/28

= 1 1/28

希望可以幫到你 ^O^

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