Soluzione - Long subtraction

188

188

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Spiegazione passo passo

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

Place value	hundreds	tens	ones

	2	0	0
-		1	2

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 number to the left (20) which becomes (19) and get (10).

Place value	hundreds	tens	ones
	1	9	10
	2	0	0
-		1	2

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

Place value	hundreds	tens	ones
	1	9	10
	2	0	0
-		1	2
			8

Subtract the numbers in the tens column from the top number:
9-1=8

Place value	hundreds	tens	ones
	1	9	10
	2	0	0
-		1	2
		8	8

Write 1 in the hundreds place.

Place value	hundreds	tens	ones
	1	9	10
	2	0	0
-		1	2
	1	8	8

The solution is: 188

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