Soluzione - Long subtraction

2, 712

2,712

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Spiegazione passo passo

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

Place value	ones	.	tenths	hundredths	thousandths

	3	,	0	5
-	0	,	3	3	8
		,

Put zeros in the blank number places:

Place value	ones	.	tenths	hundredths	thousandths

	3	,	0	5	0
-	0	,	3	3	8
		,

2. Subtract the numbers using long subtraction method

Because the upper digit (0) in the thousandths column is too small to get a positive difference, borrow 1 from the digit (5) in the next number place which becomes (4) and get (10).

Place value	ones	.	tenths	hundredths	thousandths
				4	10
	3	,	0	5	0
-	0	,	3	3	8
		,

Subtract the numbers in the thousandths column from the top number:
10-0-8=2

Place value	ones	.	tenths	hundredths	thousandths
				4	10
	3	,	0	5	0
-	0	,	3	3	8
		,			2

Subtract the numbers in the hundredths column from the top number:
4-3=1

Place value	ones	.	tenths	hundredths	thousandths
				4	10
	3	,	0	5	0
-	0	,	3	3	8
		,		1	2

Because the upper digit (0) in the tenths column is too small to get a positive difference, borrow 1 from the digit (3) in the next number place which becomes (2) and get (10).

Place value	ones	.	tenths	hundredths	thousandths
	2		10
				4	10
	3	,	0	5	0
-	0	,	3	3	8
		,		1	2

Subtract the numbers in the tenths column from the top number:
10-3=7

Place value	ones	.	tenths	hundredths	thousandths
	2		10
				4	10
	3	,	0	5	0
-	0	,	3	3	8
		,	7	1	2

Subtract the numbers in the ones column from the top number:
2-0=2

Place value	ones	.	tenths	hundredths	thousandths
	2		10
				4	10
	3	,	0	5	0
-	0	,	3	3	8
	2	,	7	1	2

The solution is: 2,712

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