Page 37 - Fun with Mathematics 2

4 -DIGIT SUBTRACTION (WITHOUT REGROUPING)

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Subtract 635 from 7869.
Step 1. Subtract the digits under the ones (O) column.
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Th H T O 9 ones – 5 ones = ones
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7 8 6 9 Write under the ones (O) column.
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– 6 3 5 Step 2. Subtract the digits under the tens (T) column.

6 tens – 3 tens = 3 tens
3 2 3 4 Write 3 under the tens (T) column.
Step 3. Subtract the digits under the hundreds (H) column.
8 hundreds – 6 hundreds = 2 hundreds
Write 2 under the hundreds (H) column.
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Step . Subtract the digits under the thousands (Th) column.
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7 thousands – thousands = 3 thousands
Write 3 under the thousands (Th) column.
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The difference between 7869 and 635 is 323 .
4 -DIGIT SUBTRACTION (WITH REGROUPING)

Subtract 5168 from 9356.

Step 1. We cannot subtract 8 ones from 6 ones.
Th H T O So, we borrow 1 ten from the tens (T) column.
2 1 4 16 Now, we have 1 ten + 6 ones = 16 ones under
9 3 5 6 the ones (O) column.

– 5 1 6 8 16 ones – 8 ones = 8 ones
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1 8 8 Write 8 under the ones (O) column. 4
Step 2. In the tens (T) column, we are left with tens.
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We cannot subtract 6 tens from tens.
So, we borrow 1 hundred from the hundreds (H) column.
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Now, we have 1 hundred + tens = 1 tens under
the tens (T) column.
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1 tens – 6 tens = 8 tens
Write 8 under the tens (T) column.
Step 3. In the hundreds (H) column, we are left with
2 hundreds.
Subtract the digits under the hundreds (H) column.
2 hundreds – 1 hundred = 1 hundred
Write 1 under the hundreds (H) column.
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Step . Subtract the digits under the thousands (Th) column.
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9 thousands – 5 thousands = thousands
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Write under the thousands (Th) column.
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The difference between 9356 and 5168 is 188.

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