Question

Riley just opened a checking account at the bank. Within the first month, she deposited three checks for $34.98, $51.02, and $51.22. She withdrew $5.23 for new pencils, $10.22 for earbuds, and $7.89 for movies from her account in the same month.

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

Answer:

Answer 1

Solution:

Riley just opened a checking account at the bank. Within the first month, she deposited three checks for $34.98, $51.02, and $51.22.

$A = 34.98 \\ \\ = \frac{3498}{100} \\ \\ = + \frac{1749}{50}$

Second check

$B = 51.01 \\ \\ = + \frac{5101}{100}$

Third check
$C = 51.22 \\ \\ = \frac{5122}{100} \\ \\ = + \frac{2561}{50}$

Total in account
$\frac{3498}{100} + \frac{5101}{100} + \frac{5122}{100} \\ \\ = \frac{13721}{100}$

She withdrew $5.23 for new pencils =

$- 5.23 \\ \\ = \frac{ - 523}{100}$

$10.22 for earbuds
$- 10.22 \\ \\ = \frac{ - 1022}{100}$

and $7.89 for movies
$- 7.89 \\ \\ = \frac{ - 789}{100}$ from her account in the same month.

Hope it helps you.