Soluzione - Long subtraction

Spiegazione passo passo

Perché imparare questo

Termini e argomenti

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

2. Subtract the numbers using long subtraction method

5, 173

5,173

Guarda i passaggi

Place value	tens	ones	.	tenths	hundredths	thousandths

	3	4	,	2
-	2	9	,	0	2	7
			,

Put zeros in the blank number places:

Place value	tens	ones	.	tenths	hundredths	thousandths

	3	4	,	2	0	0
-	2	9	,	0	2	7
			,

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 (20) which becomes (19) and get (10).

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

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

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

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

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

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

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

Because the upper digit (4) in the ones 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 (14).

Subtract the numbers in the ones column from the top number:
14-9=5

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

The solution is: 5,173

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Why learn this

Place value

hundredths

thousandths

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