Pre-Algebra, 2010
78

 PAGE: 66 SET: Exercises PROBLEM: 78

The expression is .

Place value chart for 121 and 56.

Line up the decimal points and draw a line below the numbers.

Annex one zero to align the numbers.

First find the difference on the ones digit.

Notice that it is not possible to subtract 1 from 6.

So, 1 unit must be borrowed from tens column.

The difference of the ones digit = 11 – 6 = 5.

Next find difference of the tens digit.

Notice that it is not possible to subtract 5 from 1.

So, 1 unit must be borrowed from hundreds column.

The difference of the ones digit = 11 – 5 = 6.

The difference is 65.

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