Soluzione - Long subtraction

43.908.112

43.908.112

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Spiegazione passo passo

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

Place value	ten millions	millions	hundred thousands	ten thousands	thousands	hundreds	tens	ones

	4	3	9	1	7	5	3	0
-					9	4	1	8

2. Subtract the numbers using long subtraction method

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

Place value	ten millions	millions	hundred thousands	ten thousands	thousands	hundreds	tens	ones
							2	10
	4	3	9	1	7	5	3	0
-					9	4	1	8

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

Place value	ten millions	millions	hundred thousands	ten thousands	thousands	hundreds	tens	ones
							2	10
	4	3	9	1	7	5	3	0
-					9	4	1	8
								2

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

Place value	ten millions	millions	hundred thousands	ten thousands	thousands	hundreds	tens	ones
							2	10
	4	3	9	1	7	5	3	0
-					9	4	1	8
							1	2

Subtract the numbers in the hundreds column from the top number:
5-4=1

Place value	ten millions	millions	hundred thousands	ten thousands	thousands	hundreds	tens	ones
							2	10
	4	3	9	1	7	5	3	0
-					9	4	1	8
						1	1	2

Because the upper digit (7) in the thousands column is too small to get a positive difference, borrow 1 from the digit (1) in the next number place which becomes (0) and get (17).

Place value	ten millions	millions	hundred thousands	ten thousands	thousands	hundreds	tens	ones
				0	17
							2	10
	4	3	9	1	7	5	3	0
-					9	4	1	8
						1	1	2

Subtract the numbers in the thousands column from the top number:
17-9=8

Place value	ten millions	millions	hundred thousands	ten thousands	thousands	hundreds	tens	ones
				0	17
							2	10
	4	3	9	1	7	5	3	0
-					9	4	1	8
					8	1	1	2

Write 0 in the ten thousands place.

Place value	ten millions	millions	hundred thousands	ten thousands	thousands	hundreds	tens	ones
				0	17
							2	10
	4	3	9	1	7	5	3	0
-					9	4	1	8
				0	8	1	1	2

Write 9 in the hundred thousands place.

Place value	ten millions	millions	hundred thousands	ten thousands	thousands	hundreds	tens	ones
				0	17
							2	10
	4	3	9	1	7	5	3	0
-					9	4	1	8
			9	0	8	1	1	2

Write 3 in the millions place.

Place value	ten millions	millions	hundred thousands	ten thousands	thousands	hundreds	tens	ones
				0	17
							2	10
	4	3	9	1	7	5	3	0
-					9	4	1	8
		3	9	0	8	1	1	2

Write 4 in the ten millions place.

Place value	ten millions	millions	hundred thousands	ten thousands	thousands	hundreds	tens	ones
				0	17
							2	10
	4	3	9	1	7	5	3	0
-					9	4	1	8
	4	3	9	0	8	1	1	2

The solution is: 43,908,112

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