A student buys an algebra textbook for \(\$10.35\), a philosophy textbook for \( \$9.72\), and a dictionary for \(\$13.07\). What is the total cost of the books?

\(\$ 33.14\)


To get this answer simply add up the costs of the textbooks. \(\$10.35 + \$9.72 + \$13.07 = \$33.14\).
A shortcut to quickly answering questions that involve adding decimals is to recognize that the right-most value in the answer (in this case 4) is found by summing the right-most values in the numbers you're adding. 5 + 2 + 7 = 14 which has a right-most value of 4 meaning that the answer will end in 4.
Knowing this trick you can eliminate all answers that don't end in 4 which will often leave you with only one or two possible answers for the question.

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