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

19, 974

19,974

Guarda i passaggi

Put zeros in the blank number places:

Place value	tens	ones	.	tenths	hundredths	thousandths

	2	1	,	0	0	0
-		1	,	0	2	6
			,

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 (1.00) which becomes (0.99) and get (10).

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

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

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

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

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

Subtract the numbers in the tenths column from the top number:
9-0=9

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

Because the upper digit (0) in the ones 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).

Subtract the numbers in the ones column from the top number:
10-1=9

Write 1 in the tens place.

The solution is: 19,974

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Why learn this

Place value

hundredths

thousandths

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