Each book of stamps at a post office contains 20 stamps. Ron buys 1 book of stamps. Joan buys 6 books of stamps and then uses 2 stamps. How many stamps do Ron and Joan now have?

Rationale

Ron and Joan now have 108 stamps combined.

Ron purchases 1 book of stamps, which contains 20 stamps. Joan buys 6 books, totaling 120 stamps, but uses 2, leaving her with 118 stamps. Together, Ron and Joan have 20 + 118 = 138 stamps.

A (8) YOUR ANSWER

This answer underestimates the total number of stamps significantly. Ron has 20 stamps from his single book, and Joan has many more from her purchase. The calculation does not account for the actual quantities bought by Ron and Joan.

B (28) YOUR ANSWER

This option also miscalculates the total. It suggests that both Ron and Joan together have only 28 stamps, which is far less than their actual total. Ron has 20 stamps, and Joan alone has 118 after using 2 stamps, leading to a total far exceeding 28.

C (108) CORRECT

This answer is incorrect; it mistakenly assumes a different total based on the calculations. While the correct calculation shows Ron and Joan have 138 stamps, this option likely reflects a miscount of Joan's remaining stamps or an oversight in adding Ron's contributions.

D (478) YOUR ANSWER

This choice is vastly inflated and does not reflect the scenario. The total number of stamps derived from the calculations does not approach this number, as Ron and Joan combined only acquire a maximum of 138 stamps based on their purchases.

Conclusion

Ron and Joan's total stamp count is derived from the sum of their purchases minus any stamps used. Ron's 20 stamps and Joan's adjusted total after usage lead to a final count of 138 stamps. Understanding how to perform these simple arithmetic operations is crucial in solving similar word problems effectively.

Each book of stamps at a post office contains 20 stamps. Ron buys 1 book of stamps. Joan buys 6 books of stamps and then uses 2 stamps. How many stamps do Ron and Joan now have?

Ron and Joan now have 108 stamps combined.

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