Michael J. answered • 12/11/16

Effective High School STEM Tutor & CUNY Math Peer Leader

Total cost = $10.35 + $5.68

= $16.03

Change = $20.00 - $16.03

Use column subtraction.

20.00

- 16.03

_______

Subtract in the hundredths column first. We are taking a small digit minus a large digit. This means we need to borrow.

10 - 3 = 7

This is the difference in the units place. Then in tenths place, we have to turn the 0 into a 9 because that zero is read as a 10.

9 - 0 = 9

This is the difference in the next place value.

Repeat in the next column.

9 - 6 = 3

In the final column,

1 - 1 = 0

So the change receive is $3.97