Subtract With Pencil and Paper

How to subtract two-digit numbers (for example 61 - 42).

Place one number above the other number so that the tens' place digits and ones' place digits are lined up. Draw a line under the bottom number.

6 1

- 4 2
Subtract the ones' place digits. If the second number's ones' place is too large, you have to 'borrow' 10 from the first number's tens' place.

5 11

6 1

- 4 2

9
Subtract the tens' place digits (using the reduced tens' place number if you had to borrow) and place the answer below the line in the tens' place column.

5 11

6 1

- 4 2

1 9

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Game Name	Description	Best Score
	How many correct answers can you get in 60 seconds?	0
	Extra time is awarded for each correct answer. Play longer by getting more correct.	0
	How fast can you get 20 more correct answers than wrong answers?	999