**Fill in the missing digits :**

Here you can find example problems based on addition and subtraction. Each problem will contain some missing digit, we need to think and decide which number should be replaced in the missing place to make the statement true.

This is basic topic for the students who are in primary level. By practicing this concept students can improve their thinking ability in addition and subtraction.

**Example 1 :**

Find the missing digit

**Solution :**

Usually we perform addition, subtraction and multiplication starting from the ones digit.

Based on this rule, by considering the ones digit, we have 8 which is less than 9. So we have to borrow one from the preceding number for subtraction. But in the answer we have 1 in the tens digit. So we have to put 7 in the missing place.

By borrowing one from 7, 8 will become 18 and we can subtract 9 from this 18 to make it as 8.Now we have 6 in the missing place instead of 7. So 6 - 5 will become 1.

Hence, the missing digit should be replaced by the number "7".

**Example 2 :**

Fill in the missing digit

**Solution :**

In one's digit, we have 9 - 1 = 8

In tens place, we have 3 - 0 = 0

Likewise in hundreds place, we have 7 - 4 = 3.

Hence, the missing digit should be replaced by the number "3"

**Example 3 :**

Find the missing digit

**Solution :**

In the above question, we have to perform addition. Here we have to think and decide which number should be added by 9 to make the answer ends with 8.

From this we come to know that if we put 9 in the missing place, we will get 18.

**Hence, the missing digit should be replaced by the number "9"**

**Example 4 :**

Find the missing digit

**Solution :**

In the above question, we have to perform addition.

In one's digit, we have 6 + 0 = 6

In ten's digit, we have 4 + 2. By adding 4 and 2 we will get 6.

Hence, the missing digit should be replaced by the number "6"

**Example 5 :**

Find the missing digit

**Solution :**

In the above question, we have to perform subtraction. Here we need to think which number should be subtracted from 5 to make the answer as 5.

From this we can decide, if we subtract 0 from 5 we will get the same 5.

Hence, the missing digit should be replaced by the number "5".

**Example 6 :**

Find the missing digit

**Solution :**

In the above question, we have to perform subtraction. In hundreds place we have 4 which is greater than 3. If we subtract 3 from 4, we will get 1.

Hence, the missing digit should be replaced by the number "1"

**Example 7 :**

Find the missing digit

**Solution :**

In the above question, we have to perform addition. In one's place we have 1 and 9. If we add 1 and 9 we will get 10. So that we put 0 in one's place and keep 1 as remainder. If we add the remainder 1 by 4, we will get 5. If we add 1 again, we will get the answer 6.

Hence, the missing digit should be replaced by the number "1"

**Example 8 :**

Find the missing number

**Solution :**

In the above question, we have to perform subtraction. In one's place we have 0 which is less than 9. So we have to borrow 1 from the preceding digit and subtract 9 from this number.

Hence, the missing digit should be replaced by the number "5"

After having gone through the stuff given above, we hope that the students would have understood "Fill in the missing digits".

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