Page 45 - Touchpad Mathematics V1.0 C1

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\ 17-Nov-2025 Surender Singh Rothan Proof-7 Reader’s Sign _______________________ Date __________

2. use number combinations to find the missing numbers.

a. 4 + = 9 b. 7 + = 8 c. + 0 = 9

d. + 2 = 9 e. 5 + = 8 f. + 1 = 8

g. + 4 = 8 h. 3 + 5 = i. 2 + 4 =

VertiCAl Addition

To add numbers vertically, we put one number under the other. This type of

addition is called vertical addition.
Draw as many lines
Let us add 5 and 4. as each number and

count them together.
5

+ 4
9

Thus, 5 + 4 = 9.
Some more examples:

a. 3 | | | b. 8 | | | | | | | |
+ 6 | | | | | | + 9 | | | | | | | | |

9 1 7

Exercise 3F

1. Add the following:

4 6

a. + 5 b. + 7

2 8

c. + 6 d. + 6

43
Addition up to 20