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

30, 984

30,984

Guarda i passaggi

Put zeros in the blank number places:

Place value	tens	ones	.	tenths	hundredths	thousandths

	3	5	,	0	0	0
-		4	,	0	1	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 (5.00) which becomes (4.99) and get (10).

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

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

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

Subtract the numbers in the hundredths column from the top number:
9-1=8

Place value	tens	ones	.	tenths	hundredths	thousandths
		4		9	9	10
	3	5	,	0	0	0
-		4	,	0	1	6
			,		8	4

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

Place value	tens	ones	.	tenths	hundredths	thousandths
		4		9	9	10
	3	5	,	0	0	0
-		4	,	0	1	6
			,	9	8	4

Subtract the numbers in the ones column from the top number:
4-4=0

Place value	tens	ones	.	tenths	hundredths	thousandths
		4		9	9	10
	3	5	,	0	0	0
-		4	,	0	1	6
		0	,	9	8	4

Write 3 in the tens place.

Place value	tens	ones	.	tenths	hundredths	thousandths
		4		9	9	10
	3	5	,	0	0	0
-		4	,	0	1	6
	3	0	,	9	8	4

The solution is: 30,984

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Why learn this

Place value

hundredths

thousandths

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