Solution - Long subtraction

2, 918

2,918

See steps

Step-by-step explanation

1. Rewrite the numbers from top to bottom, aligned by their place values

Place value	thousands	hundreds	tens	ones

	2	9	2	1
-				3

2. Subtract the numbers using long subtraction method

Because the upper digit (1) in the ones column is too small to get a positive difference, borrow 1 from the digit (2) in the next number place which becomes (1) and get (11).

Place value	thousands	hundreds	tens	ones
			1	11
	2	9	2	1
-				3

Subtract the numbers in the ones column from the top number:
11-3=8

Place value	thousands	hundreds	tens	ones
			1	11
	2	9	2	1
-				3
				8

Write 1 in the tens place.

Place value	thousands	hundreds	tens	ones
			1	11
	2	9	2	1
-				3
			1	8

Write 9 in the hundreds place.

Place value	thousands	hundreds	tens	ones
			1	11
	2	9	2	1
-				3
		9	1	8

Write 2 in the thousands place.

Place value	thousands	hundreds	tens	ones
			1	11
	2	9	2	1
-				3
	2	9	1	8

The solution is: 2,918

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Long substraction