Soluzione - Long subtraction

2, 788

2,788

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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	,	4
-	0	,	6	1	2
		,

Put zeros in the blank number places:

Place value	ones	.	tenths	hundredths	thousandths

	3	,	4	0	0
-	0	,	6	1	2
		,

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 number to the left (40) which becomes (39) and get (10).

Place value	ones	.	tenths	hundredths	thousandths
			3	9	10
	3	,	4	0	0
-	0	,	6	1	2
		,

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

Place value	ones	.	tenths	hundredths	thousandths
			3	9	10
	3	,	4	0	0
-	0	,	6	1	2
		,			8

Subtract the numbers in the hundredths column from the top number:
9-1=8

Place value	ones	.	tenths	hundredths	thousandths
			3	9	10
	3	,	4	0	0
-	0	,	6	1	2
		,		8	8

Because the upper digit (3) 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 (13).

Place value	ones	.	tenths	hundredths	thousandths
	2		13
			3	9	10
	3	,	4	0	0
-	0	,	6	1	2
		,		8	8

Subtract the numbers in the tenths column from the top number:
13-6=7

Place value	ones	.	tenths	hundredths	thousandths
	2		13
			3	9	10
	3	,	4	0	0
-	0	,	6	1	2
		,	7	8	8

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

Place value	ones	.	tenths	hundredths	thousandths
	2		13
			3	9	10
	3	,	4	0	0
-	0	,	6	1	2
	2	,	7	8	8

The solution is: 2,788

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