Solution - Long subtraction

2.192091

2.192091

See steps

Step-by-step explanation

1. Rewrite the numbers from top to bottom, aligned by their place values

Place value	ones	.	tenths	hundredths	thousandths	ten thousandths	hundred thousandths	millionths

	3	.	4	5	7	9	8
-	1	.	2	6	5	8	8	9
		.

Put zeros in the blank number places:

Place value	ones	.	tenths	hundredths	thousandths	ten thousandths	hundred thousandths	millionths

	3	.	4	5	7	9	8	0
-	1	.	2	6	5	8	8	9
		.

2. Subtract the numbers using long subtraction method

Because the upper digit (0) in the millionths column is too small to get a positive difference, borrow 1 from the digit (8) in the next number place which becomes (7) and get (10).

Place value	ones	.	tenths	hundredths	thousandths	ten thousandths	hundred thousandths	millionths
							7	10
	3	.	4	5	7	9	8	0
-	1	.	2	6	5	8	8	9
		.

Subtract the numbers in the millionths column from the top number:
10-0-9=1

Place value	ones	.	tenths	hundredths	thousandths	ten thousandths	hundred thousandths	millionths
							7	10
	3	.	4	5	7	9	8	0
-	1	.	2	6	5	8	8	9
		.						1

Because the upper digit (7) in the hundred thousandths column is too small to get a positive difference, borrow 1 from the digit (9) in the next number place which becomes (8) and get (17).

Place value	ones	.	tenths	hundredths	thousandths	ten thousandths	hundred thousandths	millionths
						8	17
							7	10
	3	.	4	5	7	9	8	0
-	1	.	2	6	5	8	8	9
		.						1

Subtract the numbers in the hundred thousandths column from the top number:
17-8=9

Place value	ones	.	tenths	hundredths	thousandths	ten thousandths	hundred thousandths	millionths
						8	17
							7	10
	3	.	4	5	7	9	8	0
-	1	.	2	6	5	8	8	9
		.					9	1

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

Place value	ones	.	tenths	hundredths	thousandths	ten thousandths	hundred thousandths	millionths
						8	17
							7	10
	3	.	4	5	7	9	8	0
-	1	.	2	6	5	8	8	9
		.				0	9	1

Subtract the numbers in the thousandths column from the top number:
7-5=2

Place value	ones	.	tenths	hundredths	thousandths	ten thousandths	hundred thousandths	millionths
						8	17
							7	10
	3	.	4	5	7	9	8	0
-	1	.	2	6	5	8	8	9
		.			2	0	9	1

Because the upper digit (5) in the hundredths column is too small to get a positive difference, borrow 1 from the digit (4) in the next number place which becomes (3) and get (15).

Place value	ones	.	tenths	hundredths	thousandths	ten thousandths	hundred thousandths	millionths
			3	15
						8	17
							7	10
	3	.	4	5	7	9	8	0
-	1	.	2	6	5	8	8	9
		.			2	0	9	1

Subtract the numbers in the hundredths column from the top number:
15-6=9

Place value	ones	.	tenths	hundredths	thousandths	ten thousandths	hundred thousandths	millionths
			3	15
						8	17
							7	10
	3	.	4	5	7	9	8	0
-	1	.	2	6	5	8	8	9
		.		9	2	0	9	1

Subtract the numbers in the tenths column from the top number:
3-2=1

Place value	ones	.	tenths	hundredths	thousandths	ten thousandths	hundred thousandths	millionths
			3	15
						8	17
							7	10
	3	.	4	5	7	9	8	0
-	1	.	2	6	5	8	8	9
		.	1	9	2	0	9	1

Subtract the numbers in the ones column from the top number:
3-1=2

Place value	ones	.	tenths	hundredths	thousandths	ten thousandths	hundred thousandths	millionths
			3	15
						8	17
							7	10
	3	.	4	5	7	9	8	0
-	1	.	2	6	5	8	8	9
	2	.	1	9	2	0	9	1

The solution is: 2.192091

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Terms and topics

Long substraction