Addition of 2-Digit Numbers using Short Form

We will discuss about addition of 2-digit numbers with regrouping using short form:

Let's try to solve the following examples:

A. Addition of Two 2-Digit Numbers:

1. Add 44 and 39.

Solution: 

To find the sum, we take the following steps:

Step I: Write the given numbers in column form as shown:


Step II:  Add the ones:

4 ones + 9 ones = 13 ones

                        = 1 ten + 3 ones

Write 3 under ones column and carry over 1 to tens column.

2-Digit Addition Short Form

Step III: Add the tens :

4 tens + 3 tens + 1 ten (carried over)

= 8 tens

44

Write 8 under tens column.

2-Digit Addition Short Form

B. Addition of Three 2-Digit Numbers:

We can add 3 numbers also by the method given above.

1. Add 13, 24 and 54.

Solution:

To find the sum, we write the numbers in column form and add columnwise.

Addition of Three 2-Digit Numbers

Thus, the sum of 13, 24 and 54 is 91.


Questions and Answers on Addition of 2-Digit Numbers using Short Form:

1. Add the following Two 2-Digit Numbers using Short Form:

(i) 77 + 18 = _____

(ii) 28 + 36 = _____

(iii) 56 + 29 = _____

(iv) 68 + 15 = _____

(v) 32 + 49 = _____

(vi) 49 + 23 = _____

(vii) 55 + 28 = _____

(viii) 41 + 39 = _____


Answer:

1. (i) 95

(ii) 64

(iii) 85

(iv) 83

(v) 81

(vi) 72

(vii) 83

(viii) 80


2. Add the following Thee 2-Digit Numbers using Short Form:

(i) 52 + 15 + 18 = _____

(ii) 48 + 12 + 24 = _____

(iii) 36 + 19 + 23 = _____

(iv) 65 + 12 + 14 = _____

(v) 15 + 37 + 27 = _____

(vi) 24 + 25 + 32 = _____

(vii) 35 + 24 + 28 = _____

(viii) 59 + 11 + 21 = _____


Answer:

2. (i) 85

(ii) 84

(iii) 78

(iv) 91

(v) 79 

(vi) 81

(vii) 87

(viii) 91 

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