Find the Missing Digits

How to find the missing digits in the blank spaces?

Example:

$Find the Missing Digits$

Add the ONES: 5 + 9 = 14

Regroup as 1 Ten and 4 Ones

Add the TENS: 2 + 1 carry over = 3

Write 2 in the box to make 3 + 2 = 5

Add the HUNDREDS: 4 + 1 = 5

Add the THOUSANDS: 6 + 2 = 8

Write 2 in the box. 0

$Missing Digits$

ONES

TENS

HUNDREDS

THOUSANDS

$Missing Numbers$

Take 1 from TENS

Take 1 from THOUSANDS

4 + 1

Compensate for the 1 given to Thousands Place.

$Missing Digits in Addition$

Steps:

I: Add ones. 9 + 4 + 4 = 17. Write 7 under ones, carry 1 to tens.

II: Add tens leaving the □. 1 + 3 + 1 = 5. If 5 + 6 = 11, then we get 1 in tens place. Write 6 in the □. Carry 1 to hundreds.

III: Add the hundreds including the carried 1. 1 + 5 + 2 + 6 = 14. We get 4 in the hundreds place. Carry 1 to thousands.

IV: Add thousands leaving the □. 1 + 3 + 8 = 12. 12 + 1 = 13. Write 1 in the □.

$Find the Missing Digits in Addition$

Steps:

I: Add ones leaving the □. 4 + 6 = 10. 10 + 5 = 15, then we get 5 in the ones place. Write 5 in the □. Carry 1 to tens place.

II: Add tens. 1 + 3 + 4 + 9 = 17. Write 7 in the tens place, carry 1 to hundreds place.

III: Add the hundreds leaving the □. 1 + 5 +3 = 9. 9 + 2 = 11, then we get 1 in the hundreds place. Write 2 in the □. Carry 1 to thousands place.

IV: Add thousands leaving the □. 1 + 6 + 1 = 8; 8 + 1 = 9. Write 1 in the □.

Questions and Answers on Find the Missing Digits:

Find the Missing Digits in Addition:

I. Replace □ by the correct digit.

(i) □ 2 1 7

+ 3 8 1 □

13 □ 3 1

(ii) 3 4 5 1 □

+ 1 2 □ 2 3

□ 7 1 3 7

Answer:

I. (i) 9 2 1 7

+ 3 8 1 4

13 0 3 1

(ii) 3 4 5 1 4

+ 1 2 6 2 3

4 7 1 3 7

Find the Missing Digits in Subtraction:

II. Find the missing digit.

(i) 9 □ □ □ □ □

- 3 8 9 4 2 1

5 7 9 0 5 2

(ii) 5 □ 5 4 8

- □ 6 2 3 □

1 8 3 0 9

Answer:

II. (i) 9 6 8 4 7 3

- 3 8 9 4 2 1

5 7 9 0 5 2

(ii) 5 4 5 4 8

- 3 6 2 3 9

1 8 3 0 9

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