Soluzione - Long subtraction

3, 24

3,24

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Spiegazione passo passo

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

Place value	tens	ones	.	tenths	hundredths

	1	2
-		8	,	7	6
			,

Put zeros in the blank number places:

Place value	tens	ones	.	tenths	hundredths

	1	2	,	0	0
-		8	,	7	6
			,

2. Subtract the numbers using long subtraction method

Because the upper digit (0) in the hundredths column is too small to get a positive difference, borrow 1 from the number to the left (2.0) which becomes (1.9) and get (10).

Place value	tens	ones	.	tenths	hundredths
		1		9	10
	1	2	,	0	0
-		8	,	7	6
			,

Subtract the numbers in the hundredths column from the top number:
10-0-6=4

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

Subtract the numbers in the tenths column from the top number:
9-7=2

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

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	hundredths
	0	11
		1		9	10
	1	2	,	0	0
-		8	,	7	6
			,	2	4

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

Place value	tens	ones	.	tenths	hundredths
	0	11
		1		9	10
	1	2	,	0	0
-		8	,	7	6
		3	,	2	4

Write 0 in the tens place.

Place value	tens	ones	.	tenths	hundredths
	0	11
		1		9	10
	1	2	,	0	0
-		8	,	7	6
	0	3	,	2	4

The solution is: 3,24

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