Solution - Long subtraction

Step-by-step explanation

Why learn this

Terms and topics

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

See steps

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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Place value

hundredths

thousandths

Long substraction