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Subtract money amounts

Subtracting money amounts involves finding the difference between prices, determining change, or comparing monetary quantities represented in dollars and cents. Learners connect $1 with 100 cents, align dollars and hundredths by place value, and reason about regrouping when a digit in the minuend is too small; a number line or bar model can show the distance between amounts. The scope is limited to amounts expressed to the nearest cent, not more general decimal subtraction or financial calculations.

Detailed Explanation: Subtract money amounts

Line up the amounts by place value: dollars under dollars, tenths under tenths, and hundredths under hundredths. Keep the decimal points lined up.

Example: Find the difference between 5.00andand$2.67$.

Write the subtraction:

$5.00− $2.67\begin{array}{r} \$5.00\\ -\ \$2.67\\ \hline \end{array}

Start at the hundredths place. You cannot subtract 77 hundredths from 00 hundredths, so regroup.

  • Take 11 dollar from the 55 dollars. Now there are 44 dollars and 1010 tenths.
  • Regroup 11 tenth as 1010 hundredths. Now there are 99 tenths and 1010 hundredths.

The problem is now:

$4.9 10− $2.6 7\begin{array}{r} \$4.9\,10\\ -\ \$2.6\,7\\ \hline \end{array}

Subtract from right to left:

  • Hundredths: 10−7=310-7=3
  • Tenths: 9−6=39-6=3
  • Dollars: 4−2=24-2=2

So,

$5.00−$2.67=$2.33\$5.00-\$2.67=\boxed{\$2.33}

The difference is 2.33.Youcancheckbyadding:. You can check by adding: $2.67+$2.33=$5.00$.

Learn by doing: Subtract money amounts

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    Coin Math - Subtract from a Dollar and Change - Coins Minus Amount (Pictures)

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