Soluzione - Long subtraction

3, 73

3,73

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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	0	,	1
-	1	6	,	3	7
			,

Put zeros in the blank number places:

Place value	tens	ones	.	tenths	hundredths

	2	0	,	1	0
-	1	6	,	3	7
			,

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 (1) in the next number place which becomes (0) and get (10).

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

Subtract the numbers in the hundredths column from the top number:
10-0-7=3

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

Because the upper digit (0) in the tenths column is too small to get a positive difference, borrow 1 from the number to the left (20) which becomes (19) and get (10).

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

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

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

Subtract the numbers in the ones column from the top number:
9-6=3

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

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

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

The solution is: 3,73

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