Question

Part A

Katie just opened a checking account at the bank. Within the first month, she deposited three checks for $23.87, $41.03, and $61.33. She withdrew $4.34 for new pencils, $21.11 for earbuds, and $8.78 for movies from her account in the same month.


Write Katie’s withdrawals as negative rational numbers and her deposits as positive rational numbers.


Part B


Order the rational numbers from least to greatest and explain your reasoning.


Part C


At the beginning of the month Katie’s balance was $128. What was her balance at the end of the month after all of her deposits and withdrawals? You must show your work, no credit will be given for just an answer.

Answer 1

Explanation:

Katie's deposits are positive: 23.87, 41.03, and 61.33.

Her withdrawals are negative: -4.34 -21.11, -8.78.

Sorted from least to greatest (most negative is least, most positive is greatest):

-21.11, -8.78, -4.34, 23.87, 41.03, 61.33

Katie started with $128. Add to it all the deposits and withdrawals:

128 − 21.11 − 8.78 − 4.34 + 23.87 + 41.03 + 61.33 = 220