Soluzione - Long subtraction

85990, 1

85990,1

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Spiegazione passo passo

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

Place value	ten thousands	thousands	hundreds	tens	ones	.	tenths

	8	6	0	0	0
-					9	,	9
						,

Put zeros in the blank number places:

Place value	ten thousands	thousands	hundreds	tens	ones	.	tenths

	8	6	0	0	0	,	0
-					9	,	9
						,

2. Subtract the numbers using long subtraction method

Because the upper digit (0) in the tenths column is too small to get a positive difference, borrow 1 from the number to the left (6.000) which becomes (5.999) and get (10).

Place value	ten thousands	thousands	hundreds	tens	ones	.	tenths
			5	9	9		10
	8	6	0	0	0	,	0
-					9	,	9
						,

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

Place value	ten thousands	thousands	hundreds	tens	ones	.	tenths
			5	9	9		10
	8	6	0	0	0	,	0
-					9	,	9
						,	1

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

Place value	ten thousands	thousands	hundreds	tens	ones	.	tenths
			5	9	9		10
	8	6	0	0	0	,	0
-					9	,	9
					0	,	1

Write 9 in the tens place.

Place value	ten thousands	thousands	hundreds	tens	ones	.	tenths
			5	9	9		10
	8	6	0	0	0	,	0
-					9	,	9
				9	0	,	1

Write 9 in the hundreds place.

Place value	ten thousands	thousands	hundreds	tens	ones	.	tenths
			5	9	9		10
	8	6	0	0	0	,	0
-					9	,	9
			9	9	0	,	1

Write 5 in the thousands place.

Place value	ten thousands	thousands	hundreds	tens	ones	.	tenths
			5	9	9		10
	8	6	0	0	0	,	0
-					9	,	9
		5	9	9	0	,	1

Write 8 in the ten thousands place.

Place value	ten thousands	thousands	hundreds	tens	ones	.	tenths
			5	9	9		10
	8	6	0	0	0	,	0
-					9	,	9
	8	5	9	9	0	,	1

The solution is: 85990,1

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