BORROWING IN SUBTRACTION
In addition you learn to carry; and, since subtraction is the opposite of addition, you will now use
the idea of borrowing in subtraction.
When, for example, you write
476
4 hundreds + 6 tens + 16 units
- 2 5 9, you must think
- 2 hundreds + 5 tens + 9 units
217
2 hundreds + 1 ten
+ 7 units
You can see you changed the Minuend from
4 hundreds + 7 tens + 6 units
to
4 hundreds + 6 tens + 16 units
You borrowed 1 ten from the tens column and added it to the units column so that you can now
subtract: 16 units - 9 units = 7 units.
Now, you try this one.
937
- 569
19
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