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Solution - Long subtraction

11.09090877

11.09090877

See steps

Step-by-step explanation

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

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

	1	2	.	3	2	3	2	3	2
-		1	.	2	3	2	3	2	3	2	3
			.

Put zeros in the blank number places:

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

	1	2	.	3	2	3	2	3	2	0	0
-		1	.	2	3	2	3	2	3	2	3
			.

2. Subtract the numbers using long subtraction method

Because the upper digit (0) in the hundred millionths column is too small to get a positive difference, borrow 1 from the number to the left (20) which becomes (19) and get (10).

Place value	tens	ones	.	tenths	hundredths	thousandths	ten thousandths	hundred thousandths	millionths	ten millionths	hundred millionths
									1	9	10
	1	2	.	3	2	3	2	3	2	0	0
-		1	.	2	3	2	3	2	3	2	3
			.

Subtract the numbers in the hundred millionths column from the top number:
10-0-3=7

Place value	tens	ones	.	tenths	hundredths	thousandths	ten thousandths	hundred thousandths	millionths	ten millionths	hundred millionths
									1	9	10
	1	2	.	3	2	3	2	3	2	0	0
-		1	.	2	3	2	3	2	3	2	3
			.								7

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

Place value	tens	ones	.	tenths	hundredths	thousandths	ten thousandths	hundred thousandths	millionths	ten millionths	hundred millionths
									1	9	10
	1	2	.	3	2	3	2	3	2	0	0
-		1	.	2	3	2	3	2	3	2	3
			.							7	7

Because the upper digit (1) in the millionths 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).

Place value	tens	ones	.	tenths	hundredths	thousandths	ten thousandths	hundred thousandths	millionths	ten millionths	hundred millionths
								2	11
									1	9	10
	1	2	.	3	2	3	2	3	2	0	0
-		1	.	2	3	2	3	2	3	2	3
			.							7	7

Subtract the numbers in the millionths column from the top number:
11-3=8

Place value	tens	ones	.	tenths	hundredths	thousandths	ten thousandths	hundred thousandths	millionths	ten millionths	hundred millionths
								2	11
									1	9	10
	1	2	.	3	2	3	2	3	2	0	0
-		1	.	2	3	2	3	2	3	2	3
			.						8	7	7

Subtract the numbers in the hundred thousandths column from the top number:
2-2=0

Place value	tens	ones	.	tenths	hundredths	thousandths	ten thousandths	hundred thousandths	millionths	ten millionths	hundred millionths
								2	11
									1	9	10
	1	2	.	3	2	3	2	3	2	0	0
-		1	.	2	3	2	3	2	3	2	3
			.					0	8	7	7

Because the upper digit (2) in the ten thousandths 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 (12).

Place value	tens	ones	.	tenths	hundredths	thousandths	ten thousandths	hundred thousandths	millionths	ten millionths	hundred millionths
						2	12
								2	11
									1	9	10
	1	2	.	3	2	3	2	3	2	0	0
-		1	.	2	3	2	3	2	3	2	3
			.					0	8	7	7

Subtract the numbers in the ten thousandths column from the top number:
12-3=9

Place value	tens	ones	.	tenths	hundredths	thousandths	ten thousandths	hundred thousandths	millionths	ten millionths	hundred millionths
						2	12
								2	11
									1	9	10
	1	2	.	3	2	3	2	3	2	0	0
-		1	.	2	3	2	3	2	3	2	3
			.				9	0	8	7	7

Subtract the numbers in the thousandths column from the top number:
2-2=0

Place value	tens	ones	.	tenths	hundredths	thousandths	ten thousandths	hundred thousandths	millionths	ten millionths	hundred millionths
						2	12
								2	11
									1	9	10
	1	2	.	3	2	3	2	3	2	0	0
-		1	.	2	3	2	3	2	3	2	3
			.			0	9	0	8	7	7

Because the upper digit (2) in the hundredths 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 (12).

Place value	tens	ones	.	tenths	hundredths	thousandths	ten thousandths	hundred thousandths	millionths	ten millionths	hundred millionths
				2	12
						2	12
								2	11
									1	9	10
	1	2	.	3	2	3	2	3	2	0	0
-		1	.	2	3	2	3	2	3	2	3
			.			0	9	0	8	7	7

Subtract the numbers in the hundredths column from the top number:
12-3=9

Place value	tens	ones	.	tenths	hundredths	thousandths	ten thousandths	hundred thousandths	millionths	ten millionths	hundred millionths
				2	12
						2	12
								2	11
									1	9	10
	1	2	.	3	2	3	2	3	2	0	0
-		1	.	2	3	2	3	2	3	2	3
			.		9	0	9	0	8	7	7

Subtract the numbers in the tenths column from the top number:
2-2=0

Place value	tens	ones	.	tenths	hundredths	thousandths	ten thousandths	hundred thousandths	millionths	ten millionths	hundred millionths
				2	12
						2	12
								2	11
									1	9	10
	1	2	.	3	2	3	2	3	2	0	0
-		1	.	2	3	2	3	2	3	2	3
			.	0	9	0	9	0	8	7	7

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

Place value	tens	ones	.	tenths	hundredths	thousandths	ten thousandths	hundred thousandths	millionths	ten millionths	hundred millionths
				2	12
						2	12
								2	11
									1	9	10
	1	2	.	3	2	3	2	3	2	0	0
-		1	.	2	3	2	3	2	3	2	3
		1	.	0	9	0	9	0	8	7	7

Write 1 in the tens place.

Place value	tens	ones	.	tenths	hundredths	thousandths	ten thousandths	hundred thousandths	millionths	ten millionths	hundred millionths
				2	12
						2	12
								2	11
									1	9	10
	1	2	.	3	2	3	2	3	2	0	0
-		1	.	2	3	2	3	2	3	2	3
	1	1	.	0	9	0	9	0	8	7	7

The solution is: 11.09090877

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Terms and topics

Long substraction