Solution - Long subtraction

243

243

See steps

Step-by-step explanation

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

Place value	hundreds	tens	ones

	2	7	9
		2	7
-			9

2. Subtract the numbers using long subtraction method

Because the upper digit (9) in the ones column is too small to get a positive difference, borrow 1 from the digit (7) in the next number place which becomes (6) and get (19).

Place value	hundreds	tens	ones
		6	19
	2	7	9
		2	7
-			9

Subtract the numbers in the ones column from the top number:
19-7-9=3

Place value	hundreds	tens	ones
		6	19
	2	7	9
		2	7
-			9
			3

Subtract the numbers in the tens column from the top number:
6-2=4

Place value	hundreds	tens	ones
		6	19
	2	7	9
		2	7
-			9
		4	3

Write 2 in the hundreds place.

Place value	hundreds	tens	ones
		6	19
	2	7	9
		2	7
-			9
	2	4	3

The solution is: 243

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Terms and topics

Long substraction