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

6, 242

6,242

Guarda i passaggi

Put zeros in the blank number places:

Place value	tens	ones	.	tenths	hundredths	thousandths

	1	5	,	0	0	0
-		8	,	7	5	8
			,

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 (5.00) which becomes (4.99) and get (10).

Place value	tens	ones	.	tenths	hundredths	thousandths
		4		9	9	10
	1	5	,	0	0	0
-		8	,	7	5	8
			,

Subtract the numbers in the thousandths column from the top number:
10-0-8=2

Place value	tens	ones	.	tenths	hundredths	thousandths
		4		9	9	10
	1	5	,	0	0	0
-		8	,	7	5	8
			,			2

Subtract the numbers in the hundredths column from the top number:
9-5=4

Place value	tens	ones	.	tenths	hundredths	thousandths
		4		9	9	10
	1	5	,	0	0	0
-		8	,	7	5	8
			,		4	2

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

Place value	tens	ones	.	tenths	hundredths	thousandths
		4		9	9	10
	1	5	,	0	0	0
-		8	,	7	5	8
			,	2	4	2

Because the upper digit (4) 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 (14).

Subtract the numbers in the ones column from the top number:
14-8=6

Write 0 in the tens place.

The solution is: 6,242

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Why learn this

Place value

hundredths

thousandths

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