Donny saves $15 on Monday, $28 on Tuesday and $13 on Wednesday. On Thursday he spends half of his total savings so far. How much did he spend?
Let's be accurate as possible and think first.
28
Donny saves a total of $15 + $28 + $13 = $56 across all 3 days.

He spends half of his total savings which is $56 * (1 / 2) = $28.

.

The answer is 28