加減乘除數

2009-02-07 9:06 pm
1. 係咪計除數先,跟住4捨5入

6.9減333除69    4.82 = 4.8
= 6.9減4.8
= 2.1
===

209除48減4.1    4.35 = 4.4
= 4.4減4.1
= 0.3
===

21加4540除231    19.65 = 19.7
= 21加19.7
= 40.7
====

2. 乘除係咪不分先後,又係4捨5入

321乘21除23
= 6741除23    293.08 = 293.1
= 292.95 乘23    292.95 = 293
= 293.1
=====

計埋直式,唔該

回答 (2)

2009-02-12 12:33 am
✔ 最佳答案
計乘除先,跟住4捨5入,跟住加減
6.9-333/69 4.8260869...=4.8
=6.9-4.8
=2.1
____________________________________________________________________
209/48-4.1    4.35 = 4.4
= 4.4-4.1
= 0.3
____________________________________________________________________
21+4540/231    19.65 = 19.7
= 21+19.7
= 40.7
____________________________________________________________________
乘除不分先後,跟住4捨5入
321x21/23
= 6741/23    293.08 = 293.1
= 293.1
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2009-02-16 16:13:59 補充:
不計直式,因為難寫
參考: my brain
2009-02-16 9:28 pm
1.係 2.係


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