Answer:Let's break down the problem step by step.*Given Facts:*- Erika's weekly allowance: PhP250.00- Daily food expenses: PhP25.50*What is asked in the problem?*The problem asks how much money is left to Erika after spending PhP25.50 for food each day from her weekly allowance.*Hidden Question:*How much does Erika spend in total for food in a week?*Operations to be used:*1. Multiplication (to calculate total food expenses for the week)2. Subtraction (to find out how much money is left)*Number Sentence:*Total food expenses = PhP25.50 x 7 days = PhP178.50Money left = PhP250.00 - PhP178.50*Answer:*Erika's weekly allowance: PhP250.00Daily food expenses: PhP25.50Money left: PhP250.00 - PhP178.50 = PhP71.50*How did we get the correct answer?*1. We calculated Erika's total food expenses for the week by multiplying her daily food expenses by 7: PhP25.50 x 7 = PhP178.502. Then, we subtracted the total food expenses from her weekly allowance to find out how much money is left: PhP250.00 - PhP178.50 = PhP71.50 ¹