Consider the question. After Martha went grocery shopping she had 4 bottles of juice in the refrigerator and 4 bottles in the pantry. During the week Martha bought 5 more bottles of juice. If Martha and her family drank 3 bottles of juice during the week, how many bottles are left?
 If the answer is '10'; explain the reasoning:
Martha had 4 bottles of juice in the pantry + 4 bottles in the refrigerator = 8 bottles of juice. After Martha went shopping she added 5 bottles of juice to the + 8 bottles she already had = 13 bottles of juice. Martha and her family drank 3 bottles of juice during the week from the 13 they had, 13 - 3 = 10 bottles left.