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D:\Working\TouchPad_Maths\TouchPad_Maths_1\Open_Files\Chap_07\Chap_07
\ 17-Nov-2025 Surender Singh Rothan Proof-7 Reader’s Sign _______________________ Date __________
using the Short Method
Example 2. Add 35 and 12.
Solution.
Step 1. Add the ones. Step 2. Add the tens.
T O T O
3 5 3 5
+ 1 2 + 1 2 +
7 + 4 7
Thus, 35 + 12 = 47.
Example 3. Add: 72 + 11. Example 4. Add: 64 + 25.
Solution. T O T O Solution. T O T O
7 2 7 2 6 4 6 4
+ 1 1 + 1 1 + 2 5 + 2 5
3 8 3 9 8 9
Thus, 72 + 11 = 83. Thus, 64 + 25 = 89.
Exercise 7C
1. Add using expanded form.
a. b.
37 tens + ones 64 tens + ones
+ 42 tens + ones + 23 tens + ones
tens + ones tens + ones
37 + 42 = 64 + 23 =
c. d.
73 tens + ones 53 tens + ones
+ 15 tens + ones + 44 tens + ones
tens + ones tens + ones
73 + 15 = 53 + 44 =
110 Mathematics 1
