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Money Problems

Grade 4 · Decimals · Worksheet 3

  1. A rectangular garden is drawn with a length of 12.5 meters and a width of 8.4 meters. What is the total area of the garden in square meters?
    Answer: ______________
  2. A rectangular garden is drawn on grid paper where each square unit represents 1 square meter. The garden has a length of 14.2 meters and a width of 9.5 meters. What is the total area of the garden in square meters?
    Answer: ______________
  3. 12.45 + 8.75 = ? Answer: ______________
  4. $14.85 + $9.65 = ? Answer: ______________
  5. Emma is buying school supplies. She needs a notebook for $3.25, a pack of pencils for $2.75, and a binder for $4.50. If she pays with a $20 bill, how much change should she receive? Answer: ______________
  6. 4.75 × 3 = ? Answer: ______________
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Answer Key & Explanations

Money Problems · Grade 4 · Worksheet 3

  1. A rectangular garden is drawn with a length of 12.5 meters and a width of 8.4 meters. What is the total area of the garden in square meters? Answer: 105 Solution: To find the area of a rectangle, we use the formula: Area = length × width Write down the given dimensions. Length = 12.5 meters Width = 8.4 meters Multiply the length by the width.
    Full step-by-step solution

    To find the area of a rectangle, we use the formula: Area = length × width Step 1: Write down the given dimensions. Length = 12.5 meters Width = 8.4 meters Step 2: Multiply the length by the width. 12.5 × 8.4 Step 3: Break the multiplication into simpler parts. First, multiply 12.5 by 8: 12.5 × 8 = 100 Step 4: Now multiply 12.5 by 0.4: 12.5 × 0.4 = 5 Step 5: Add the two results together: 100 + 5 = 105 Step 6: Include the units. Area = 105 square meters So, the total area of the garden is 105 square meters.

  2. A rectangular garden is drawn on grid paper where each square unit represents 1 square meter. The garden has a length of 14.2 meters and a width of 9.5 meters. What is the total area of the garden in square meters? Answer: 134.9 Solution: The formula for the area of a rectangle is length multiplied by width. Multiply the length (14.2) by the width (9.5).
    Full step-by-step solution

    Step 1: The formula for the area of a rectangle is length multiplied by width. Step 2: Multiply the length (14.2) by the width (9.5). Step 3: First, multiply 14.2 by 9: 14.2 * 9 = 127.8 Step 4: Next, multiply 14.2 by 0.5: 14.2 * 0.5 = 7.1 Step 5: Add the two results together: 127.8 + 7.1 = 134.9 Step 6: The total area of the garden is 134.9 square meters.

  3. 12.45 + 8.75 = ? Answer: 21.20 Solution: Write the numbers vertically, aligning the decimal points: 12.45 + 8.75 Add the hundredths place: 5 + 5 = 10. Write 0 in the hundredths place and carry over 1 to the tenths place.
    Full step-by-step solution

    Step 1: Write the numbers vertically, aligning the decimal points: 12.45 + 8.75 ------- Step 2: Add the hundredths place: 5 + 5 = 10. Write 0 in the hundredths place and carry over 1 to the tenths place. Step 3: Add the tenths place: 4 + 7 + 1 (carried over) = 12. Write 2 in the tenths place and carry over 1 to the ones place. Step 4: Add the ones place: 2 + 8 + 1 (carried over) = 11. Write 1 in the ones place and carry over 1 to the tens place. Step 5: Add the tens place: 1 (carried over) = 1. Write 1 in the tens place. Step 6: Bring down the decimal point. The final answer is 21.20.

  4. $14.85 + $9.65 = ? Answer: 24.50 Solution: Write the numbers vertically, aligning the decimal points: 14.85 + 9.65 Add the hundredths place: 5 + 5 = 10. Write 0 in the hundredths place and carry over 1 to the tenths place.
    Full step-by-step solution

    Step 1: Write the numbers vertically, aligning the decimal points: 14.85 + 9.65 ------- Step 2: Add the hundredths place: 5 + 5 = 10. Write 0 in the hundredths place and carry over 1 to the tenths place. Step 3: Add the tenths place: 8 + 6 + 1 (carried over) = 15. Write 5 in the tenths place and carry over 1 to the ones place. Step 4: Add the ones place: 4 + 9 + 1 (carried over) = 14. Write 4 in the ones place and carry over 1 to the tens place. Step 5: Add the tens place: 1 (carried over) + 1 = 2. Write 2 in the tens place. Step 6: Bring down the decimal point. The final answer is $24.50.

  5. Emma is buying school supplies. She needs a notebook for $3.25, a pack of pencils for $2.75, and a binder for $4.50. If she pays with a $20 bill, how much change should she receive? Answer: $9.50 Solution: Notebook: $3.25 Pencils: $2.75 Binder: $4.50 Total = $3.25 + $2.75 + $4.50 $3.25 + $2.75 = $6.00 $6.00 + $4.50 = $10.50 Emma paid with $20.00 Change = $20.00 - $10.50 $20.00 - $10.50 = $9.50 Emma should receive $9.50 in change.
    Full step-by-step solution

    Step 1: Find the total cost of all items Notebook: $3.25 Pencils: $2.75 Binder: $4.50 Total = $3.25 + $2.75 + $4.50 $3.25 + $2.75 = $6.00 $6.00 + $4.50 = $10.50 Step 2: Subtract total cost from money given Emma paid with $20.00 Change = $20.00 - $10.50 $20.00 - $10.50 = $9.50 Emma should receive $9.50 in change.

  6. 4.75 × 3 = ? Answer: 14.25 Solution: Write the multiplication: 4.75 × 3 Multiply the whole number part: 4 × 3 = 12 Multiply the decimal part: 0.75 × 3 = 2.25 Add the two results: 12 + 2.25 = 14.25 The final answer is 14.25.
    Full step-by-step solution

    Step 1: Write the multiplication: 4.75 × 3 Step 2: Multiply the whole number part: 4 × 3 = 12 Step 3: Multiply the decimal part: 0.75 × 3 = 2.25 Step 4: Add the two results: 12 + 2.25 = 14.25 Step 5: The final answer is 14.25.