小學數學問題 10點

🎓 學業台教學

[匿名]

2013-02-10 4:59 pm

1. 45又5份3+8又10份9=?
（請標明計算過程）

回答 (2)

Kwok

2013-02-10 5:11 pm

✔ 最佳答案

45_3/5 + 8_9/10
= [(45*5)+3]/5 + [(8*10)+9/10
=228/5 + 89/10
=228*2/5*2 + 89/10
=456/10 + 89/10
=(456 + 89)/10
= 545/10
=54_5/10
=54_1/2

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[匿名]

2013-02-13 12:17 am

45 3/5+8 9/10
=45.6+8.9
=54.5
=54 1/2

or
45 3/5+8 9/10
=(45+8)+(3/5+9/10)
=53+(3/5+9/10)
=53+(6/10+9/10)
=53+15/10
=53+1 5/10
=53+1 1/2
=54 1/2

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