Soluzione - Long subtraction

7, 75

7,75

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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

	2	2
-	1	4	,	2	5
			,

Put zeros in the blank number places:

Place value	tens	ones	.	tenths	hundredths

	2	2	,	0	0
-	1	4	,	2	5
			,

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
	2	2	,	0	0
-	1	4	,	2	5
			,

Subtract the numbers in the hundredths column from the top number:
10-0-5=5

Place value	tens	ones	.	tenths	hundredths
		1		9	10
	2	2	,	0	0
-	1	4	,	2	5
			,		5

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

Place value	tens	ones	.	tenths	hundredths
		1		9	10
	2	2	,	0	0
-	1	4	,	2	5
			,	7	5

Because the upper digit (1) in the ones 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	hundredths
	1	11
		1		9	10
	2	2	,	0	0
-	1	4	,	2	5
			,	7	5

Subtract the numbers in the ones column from the top number:
11-4=7

Place value	tens	ones	.	tenths	hundredths
	1	11
		1		9	10
	2	2	,	0	0
-	1	4	,	2	5
		7	,	7	5

Subtract the numbers in the tens column from the top number:
1-1=0

Place value	tens	ones	.	tenths	hundredths
	1	11
		1		9	10
	2	2	,	0	0
-	1	4	,	2	5
	0	7	,	7	5

The solution is: 7,75

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