Page 25 - MTH 1
P. 25
Addition of Three Numbers
To add 1 + 3 + 5
Horizontal Method Vertical Method
1 + 3 + 5 1 1
3 + 3
1 + 3 = 4 + 5 4
4 + 5 = 9 + 5
9
This method is called grouping method .
Use horizontal and vertical method to find sum.
3 + 2 + 4 = 4 + 3 + 1 =
3 + 2 + 2 = 5 + 1 + 1 =
2 + 1 + 4 = 4 + 2 + 2 =
3 2 2
5 = 2 = 3 =
+ 1 + 5 + 4
3 1 4
3 = 6 = 1 =
+ 3 + 2 + 4
25
Mathematics In Focus - 1
