F.2 Math Question(Estimation)

👨🏻‍🏫 學術台數學

2012-09-07 3:58 am

Estimation the value of the following expression and strategy used.

49.58+50.47+5.8+49.78+6.02+5.87+50.61+6.1+51.2+5.93+48.9

Need estimation strategy and answer only

更新1:

Beside rounding off,is there any other estimation strategy?

更新2:

To 002 Where is your estimation strategy?

回答 (3)

Fred

2012-09-07 6:53 am

✔ 最佳答案

49.58+50.47+5.8+49.78+6.02+5.87+50.61+6.1+51.2+5.93+48.9
~50(6)+6(5)
=300+30
=330
Applying clustering.

2012-09-06 22:55:26 補充：
Ther are los of estimate strategy..such as compensation,compatible valus,.....

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[匿名]

2012-09-07 4:22 am

49.58+50.27+5.8+49.78+6.02+5.87+50.61+6.1+51.2+5.93+48.9
=(49.78+6.02+51.2)+(50.27+5.93+5.8)+(6.1+48.9)+(49.58+5.87+50.61)
=107+62+55+106.06
=330.06

2012-09-06 20:24:56 補充：
Sorry!!!!!
49.58+50.47+5.8+49.78+6.02+5.87+50.61+6.1+51.2+5.93+48.9
=(49.78+6.02+51.2)+(50.47+5.93+5.8)+(6.1+48.9)+(49.58+5.87+50.61)
=107+62.2+55+106.06
=330.26

參考: me, me

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PeterChow

2012-09-07 4:04 am

49.58+50.47+5.8+49.78+6.02+5.87+50.61+6.1+51.2+5.93+48.9
=50+50+6+50+6+6+50+6+50+6+50
=50x6+6x4
=300+24
=324
strategy:
rounding off to nearest ten for two-digit numbers before decimal places
rounding off to nearest one for one-digit numbers before decimal places
translation(grouping same numbers)

參考: me

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收錄日期: 2021-04-20 13:17:44
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