Soluzione - Long subtraction

15, 45

15,45

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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	6	,	2
-	1	0	,	7	5
			,

Put zeros in the blank number places:

Place value	tens	ones	.	tenths	hundredths

	2	6	,	2	0
-	1	0	,	7	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 digit (2) in the next number place which becomes (1) and get (10).

Place value	tens	ones	.	tenths	hundredths
				1	10
	2	6	,	2	0
-	1	0	,	7	5
			,

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

Place value	tens	ones	.	tenths	hundredths
				1	10
	2	6	,	2	0
-	1	0	,	7	5
			,		5

Because the upper digit (1) in the tenths column is too small to get a positive difference, borrow 1 from the digit (6) in the next number place which becomes (5) and get (11).

Place value	tens	ones	.	tenths	hundredths
		5		11
				1	10
	2	6	,	2	0
-	1	0	,	7	5
			,		5

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

Place value	tens	ones	.	tenths	hundredths
		5		11
				1	10
	2	6	,	2	0
-	1	0	,	7	5
			,	4	5

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

Place value	tens	ones	.	tenths	hundredths
		5		11
				1	10
	2	6	,	2	0
-	1	0	,	7	5
		5	,	4	5

Subtract the numbers in the tens column from the top number:
2-1=1

Place value	tens	ones	.	tenths	hundredths
		5		11
				1	10
	2	6	,	2	0
-	1	0	,	7	5
	1	5	,	4	5

The solution is: 15,45

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