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

29, 246

29,246

Guarda i passaggi

Place value	tens	ones	.	tenths	hundredths	thousandths

	3	1	,	7
-		2	,	4	5	4
			,

Put zeros in the blank number places:

Place value	tens	ones	.	tenths	hundredths	thousandths

	3	1	,	7	0	0
-		2	,	4	5	4
			,

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 (70) which becomes (69) and get (10).

Place value	tens	ones	.	tenths	hundredths	thousandths
				6	9	10
	3	1	,	7	0	0
-		2	,	4	5	4
			,

Subtract the numbers in the thousandths column from the top number:
10-0-4=6

Place value	tens	ones	.	tenths	hundredths	thousandths
				6	9	10
	3	1	,	7	0	0
-		2	,	4	5	4
			,			6

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

Place value	tens	ones	.	tenths	hundredths	thousandths
				6	9	10
	3	1	,	7	0	0
-		2	,	4	5	4
			,		4	6

Subtract the numbers in the tenths column from the top number:
6-4=2

Place value	tens	ones	.	tenths	hundredths	thousandths
				6	9	10
	3	1	,	7	0	0
-		2	,	4	5	4
			,	2	4	6

Because the upper digit (1) 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 (11).

Subtract the numbers in the ones column from the top number:
11-2=9

Write 2 in the tens place.

The solution is: 29,246

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Why learn this

Place value

hundredths

thousandths

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