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

10.28

10.28

See steps

Put zeros in the blank number places:

Place value	hundreds	tens	ones	.	tenths	hundredths

	1	2	0	.	0	0
-	1	0	9	.	7	2
				.

Because the upper digit (0) in the hundredths column is too small to get a positive difference, borrow 1 from the number to the left (20.0) which becomes (19.9) and get (10).

Place value	hundreds	tens	ones	.	tenths	hundredths
		1	9		9	10
	1	2	0	.	0	0
-	1	0	9	.	7	2
				.

Subtract the numbers in the hundredths column from the top number:
10-0-2=8

Place value	hundreds	tens	ones	.	tenths	hundredths
		1	9		9	10
	1	2	0	.	0	0
-	1	0	9	.	7	2
				.		8

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

Place value	hundreds	tens	ones	.	tenths	hundredths
		1	9		9	10
	1	2	0	.	0	0
-	1	0	9	.	7	2
				.	2	8

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

Place value	hundreds	tens	ones	.	tenths	hundredths
		1	9		9	10
	1	2	0	.	0	0
-	1	0	9	.	7	2
			0	.	2	8

Subtract the numbers in the tens column from the top number:
1-0=1

Place value	hundreds	tens	ones	.	tenths	hundredths
		1	9		9	10
	1	2	0	.	0	0
-	1	0	9	.	7	2
		1	0	.	2	8

Subtract the numbers in the hundreds column from the top number:
1-1=0

Place value	hundreds	tens	ones	.	tenths	hundredths
		1	9		9	10
	1	2	0	.	0	0
-	1	0	9	.	7	2
	0	1	0	.	2	8

The solution is: 10.28

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Place value

hundredths

Long substraction