Solution - Long subtraction

5.1

5.1

See steps

Step-by-step explanation

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

Place value	tens	ones	.	tenths

	1	2	.	1
		2	.	3
-		4	.	7
			.

2. Subtract the numbers using long subtraction method

Because the upper digit (1) in the tenths 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	tens	ones	.	tenths
		1		11
	1	2	.	1
		2	.	3
-		4	.	7
			.

Subtract the numbers in the tenths column from the top number:
11-3-7=1

Place value	tens	ones	.	tenths
		1		11
	1	2	.	1
		2	.	3
-		4	.	7
			.	1

Because the upper digit (1) in the ones column is too small to get a positive difference, borrow 1 from the digit (1) in the next number place which becomes (0) and get (11).

Place value	tens	ones	.	tenths
	0	11
		1		11
	1	2	.	1
		2	.	3
-		4	.	7
			.	1

Subtract the numbers in the ones column from the top number:
11-2-4=5

Place value	tens	ones	.	tenths
	0	11
		1		11
	1	2	.	1
		2	.	3
-		4	.	7
		5	.	1

Write 0 in the tens place.

Place value	tens	ones	.	tenths
	0	11
		1		11
	1	2	.	1
		2	.	3
-		4	.	7
	0	5	.	1

The solution is: 5.1

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Long substraction