Solution - Long subtraction

1.9

1.9

See steps

Step-by-step explanation

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

Place value	ones	.	tenths

	2	.	8
	0	.	2
-	0	.	7
		.

2. Subtract the numbers using long subtraction method

Because the upper digit (8) in the tenths column is too small to get a positive difference, borrow 1 from the digit (2) in the next number place which becomes (1) and get (18).

Place value	ones	.	tenths
	1		18
	2	.	8
	0	.	2
-	0	.	7
		.

Subtract the numbers in the tenths column from the top number:
18-2-7=9

Place value	ones	.	tenths
	1		18
	2	.	8
	0	.	2
-	0	.	7
		.	9

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

Place value	ones	.	tenths
	1		18
	2	.	8
	0	.	2
-	0	.	7
	1	.	9

The solution is: 1.9

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Terms and topics

Long substraction