End of the Year Test - Grade 4 Addition, Subtraction, Patterns, and Graphs 1. Subtract. Check by adding. 2. a. Round the prices to the nearest dollar. Use the rounded prices to estimate the total bill. crackers $1.28, cheese $8.92, jam $3.77, butter $9.34. b. Now, use the exact prices (not rounded prices). Mrs. Wood bought the items listed above.