**Missing Number in Addition**

This concept will help reinforce the theory of addition and will also set up base for Introductory Algebra. Here a addition expression is provided with one missing number. You have to use the concept of addition to find the number which fulfills the expression correctly.

This types of questions are tricky as they are not that straightforward and you need to have good command of numbers and counting.

Let us consider some examples of his type of problem

**Example** **01**

Fill in the blanks with suitable number

2 + ____ = 7

Here, we have number 2 with us.

Now what number will it take to make number 7 ?

Answer is 5

If we add 2 with 5 we will get 7**Hence 5 is the right answer**

**Example 02**

Find the missing number for below addition expression

5 + ______ = 9

Here we have number 5 with us

Now what number will it take to make final number 9

Answer is 4

If we add number 4 to number 5 we will get 9

5 + **4** = 9

Now you have understood one example, it is now time to solve some questions.

**Missing Addend Sums Worksheet**

**Find Missing number in Addition**

**(01) 7 + _____ = 10**

Solution

a. we have number 7 with us

b. If we add 3 to 7 we will get number 10

**Hence, 3 is the right answer**

7 + **3** = 10

** (02) 2 + _____ = 6**

Solution

a. we have number 2

b. if we add 4 to 2, we will get number 6

**2 + 4 = 6**

**Hence, 4 is the right answer**

**(03) 0 + _____ = 9**

Solution

(a) we have number 0 with us

(b) If we add number 9 to 0, we will get number 9

**0 + 9 = 9**

**Number 9 is the right answer**

**(04) 7 + ______ = 10**

Solution

⟹ we have number 7 with us

⟹ How many more we need to make the number 10 ?

**Answer is 3**

⟹ 7 + 3 = 10

**(05) 2 + ____ = 4**

Solution

(a) we have number 2 with us

(b) if we add 2 to 2, we will get number 4

**2 + 2 = 4**

Hence, Number 2 is the right answer

**(06) ______ + 4 = 7**

Solution

we have number 4 with us

If we add number 3 to 4, we will get 7

3 + 4 = 7

Number 3 is the right answer

**(07) 4 + ______ = 8**

Solution

we have number 4 with us

If we add 4 to 4, we will get number 8

**4 + 4 = 8****Hence 4 is the right answer**

**(08) _______ + 5 = 5**

Solution

we have number 5 with us

In order to get 5, add 0 to the existing number

**0 + 5 = 5****Hence 0 is the right answer**

**(09) 2 + ______ = 3**

Solution

we have number 2 with us

If we add 1 to 2, we will get number 3

2 + 1 = 3

**Hence 1 is the right answer**

**(10) 8 + ______ = 9**

Solution

we have number 8 with us

If we add number 1 to 8, we get number 9

**8 + 1 = 9**

Number 1 is the right answer

**Missing Addends Problems** **for Grade 1**

**Find the missing number in the below addition expression**

**(01) 2 + ________ + 7 = 14**

Solution

Step 01 : Add the existing number first

⟹ 2 + 7 = 9

Step 02: Rewrite the Addition Expression

⟹ 9 + _____ = 14

We have number 9 with us

If we add number 5 in the expression, we will get 14

⟹ 9 + **5** = 14

**Hence number 5 is the right answer**

The Final Expression is ⟹ 2 + 5 + 7 = 14

**(02) 4 + _____ + 6 = 12**

Solution

Step 01: Add the existing number present

⟹ 4 + 6 = 10

Step 02: Rewriting the expression

⟹ 10 + _____ = 12

We have number 10 with us

If we add number 2, we will get 12 as a result

⟹ 10 + **2** = 12**Hence 2 is the right answer** & the final expression is:

⟹ 4 + 2 + 6 = 12

**(03) 3 + _______ + 4 = 11**

Read Solution

Step 1: Add the existing number first

⟹ 3 + 4 = 7

Step 2 : Rewriting the addition expression

⟹ 7 + ______ = 11

We have number 7 with us

If we add number 4, we will get number 11

⟹ 7 + 4 = 11

**Hence number 4 is the right answer**

The Final Expression is ⟹ 3 + 4 + 4 = 11

**(04) 6 + _______+ 3 = 19**

Solution

Step 01 : Add the existing number first

⟹ 6 + 3 = 9

Step 02: Rewriting the addition expression

⟹ 9 + ______ = 19

We have number 9 with us

If we add number 10 then we will get number 19

⟹ 9 + 10 = 19**Hence 10 is the right answer **

The Final Expression is 6 + 10 + 3 = 19

**(05) 8 + _______ + 5 = 15**

Solution

Step 01 : Add the existing Number

⟹ 8 + 5 = 13

Step 02: Rewrite the addition expression

⟹ 13 + ______ = 15

We already have 13 with us

If we add number 2, we will get 15 as final number

⟹ 13 + 2 = 15

**Hence 2 is the right answer**

The final expression is ⟹ 8 + 2 + 5 = 15

**(06) 5 + _______ + 5 = 12**

Solution

Step 01: Add existing number

⟹ 5 + 5 = 10

Step 02: Rewriting the addition expression

⟹ 10 + _____ = 12

We already have number 10 with us

If we add number 2, we will get 12

⟹ 10 + 2 = 12

**Hence 2 is the right answer**

Final Expression is ⟹ 5 + 2 + 5 = 12

**(07) 1 + _______ + 6 = 9**

**Solution**

Step 01: Add Existing number present

⟹ 1 + 6 = 7

Step 02: Rewriting the addition expression

⟹ 7 + _______ = 9

We already have number 7 with us

If we add number 2, we will finally get number 9

⟹ 7 + 2 = 9

**Hence 2 is the right answer**

Final Expression is 1 + 2 + 6 = 9

**(08) 3 + _______ + 5 = 11**

**Solution**

Step 1 : Add the existing number present

⟹ 3 + 5 = 8

Step 2 : Rewriting the addition expression

⟹ 8 + ______ = 11

We already have number 8 with us

If we add number 3, we will get 11

**Hence 3 is the right answer**

Final expression is ⟹ 3 + 3 + 5 =11

**(09) 2 + _______ + 3 = 5**

**Solution**

Step 01 : Add the existing number

⟹ 2 + 3 =5

Step 02: Rewriting the addition expression

⟹ 5 + ______ = 5

We already have number 5 with us

If we add number 0, we will get 5

⟹ 5 + 0 = 5

**Hence 0 is the right answer**

Final expression is 2 + 0 + 3 = 5

**(10) 3 + _______ + 9 = 20**

Solution

Step 01: Add the existing number

⟹ 3 + 9 = 12

Step 02: Rewrite the addition expression

⟹ 12 + ______ = 20

We have number 12 with us

If we add number 8, we will get number 20

⟹ 12 + 8 = 20

**Hence 8 is the right answer**

Final Expression is ⟹ 3 + 8 + 9 = 20