Soluzione - Long subtraction

19, 7

19,7

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Spiegazione passo passo

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

Place value	tens	ones	.	tenths

	2	0	,	7
-		1
			,

Put zeros in the blank number places:

Place value	tens	ones	.	tenths

	2	0	,	7
-		1	,	0
			,

2. Subtract the numbers using long subtraction method

Subtract the numbers in the tenths column from the top number:
7-0=7

Place value	tens	ones	.	tenths

	2	0	,	7
-		1	,	0
			,	7

Because the upper digit (0) in the ones 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 (10).

Place value	tens	ones	.	tenths
	1	10
	2	0	,	7
-		1	,	0
			,	7

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

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

Write 1 in the tens place.

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

The solution is: 19,7

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