急~中一math~20點

2007-12-16 10:56 pm
Estimate the results of the following by clustering
3a)72150+68791+71079+72924+69503
3b)11.2+8.9+10.7+9.8
3c)9302+8627+6436+9125+8934
3d)28.3+33.6+31.2+30.6

Estimate the results of the following by compatible numbers
4a)3388/7
4b)0.334x997
4c)2298/6
4d)0.502x497

回答 (6)

2007-12-17 12:41 am
3a)72150+68791+71079+72924+69503 =354447
3b)11.2+8.9+10.7+9.8 =40.4
3c)9302+8627+6436+9125+8934 =42424
3d)28.3+33.6+31.2+30.6 =123.7


4a)3388/7 =484
4b)0.334x997 =332.998
4c)2298/6 =383
4d)0.502x497 =249.494


其實你可以用計數機..去到中一可以用架啦..除非係你呀媽叫你做既數....
不過...都希望可以幫到你啦!
參考: 計數機先生
2007-12-16 11:53 pm
Estimate the results of the following by clustering
3a)72150+68791+71079+72924+69503
= 70000* 5
=350000#
3b)11.2+8.9+10.7+9.8
=10*4 =40#
3c)9302+8627+6436+9125+8934
=8000* 5 =40000#
3d)28.3+33.6+31.2+30.6
=30*4 = 120#
下面唔知要做咩
2007-12-16 11:47 pm
3a)354447
3b)40.6
3c)42424
3d)123.7
4a)484
4b)432.698
4c)383
4d)249.494
2007-12-16 11:11 pm
4a)484
4b)332.998
4c)383
4d)249.494
2007-12-16 11:09 pm
3a)289512
3b)40.6
3c)42424
3d)123.7
4a)484
4b)332.998
4c)383
4d)249.494

2007-12-16 15:12:03 補充:
sorry..第一提應該系…3a)354447
參考: me
2007-12-16 11:08 pm
3a)354447
3b)40.6
3c)42424
3d)123.7

2007-12-16 15:11:56 補充:
4a)4844b)432.6984c)3834d)249.494


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