Ballpark Estimate in Math

Introduction to ballpark estimate in math:

Ballpark estimate in math is defined as the method which is used to simply the calculation in easy way. In ballpark estimate in math the values taken for adding and subtracting process are changed to nearest and easier numbers for simplification. In considerations of small values in calculations they are changed to their nearest 10’s and for largest values of calculations they are changed to their nearest 50’s and 100’s. Understanding Answers for Math Problems is always challenging for me but thanks to all math help websites to help me out.


Examples for ballpark estimate in math:


1)      Evaluate 73 + 88.

Solution:

73 is changed to the nearest value 70 ( i.e. nearest 10’s since it is the smallest values )

88 is changed to the nearest value 90 ( i.e. nearest 10’s since it is the smallest values )

70

+90

-------

160

-------

2)      Evaluate 67 - 51.

Solution:

67  is changed to the nearest value 70 ( i.e. nearest 10’s since it is the smallest values )

51  is changed to the nearest value 50 ( i.e. nearest 10’s since it is the smallest values )

70

- 50

-------

20

-------

3)      Evaluate 163 + 188.

Solution:

163 is changed to the nearest value 150 ( i.e. nearest 50’s since it is the largest values )

188 is changed to the nearest value 200 ( i.e. nearest 100’s since it is the largest values )

150

+200

-------

350

-------

4)      Evaluate 107 - 65.

Solution:

107  is changed to the nearest value 100 ( i.e. nearest 100’s since it is the largest values )

65  is changed to the nearest value 50 ( i.e. nearest 50’s since it is the largest values )

100

-  50

-------

50

-------


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Some excercise about the ballpark estimate in maths.

1)      Evaluate 64 + 47. ( answer: 110 )

2)      Evaluate 194 - 173. ( answer: 50 )