Money Problems

lessonbunny.com

Answer Key & Explanations

Money Problems · Grade 4 · Worksheet 1

1. $18.65 + $27.38 = ? Answer: 46.03 Solution: Write the numbers vertically, aligning the decimal points: 18.65 + 27.38 Add the hundredths place: 5 + 8 = 13. Write 3 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: 18.65 + 27.38 ------- Step 2: Add the hundredths place: 5 + 8 = 13. Write 3 in the hundredths place and carry over 1 to the tenths place. Step 3: Add the tenths place: 6 + 3 + 1 (carried over) = 10. Write 0 in the tenths place and carry over 1 to the ones place. Step 4: Add the ones place: 8 + 7 + 1 (carried over) = 16. Write 6 in the ones place and carry over 1 to the tens place. Step 5: Add the tens place: 1 + 2 + 1 (carried over) = 4. Write 4 in the tens place. Step 6: Bring down the decimal point. The final answer is $46.03.

2. 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.

3. $24.85 + $16.37 = ? Answer: 41.22 Solution: Write the numbers vertically, aligning the decimal points: 24.85 + 16.37 Add the hundredths place: 5 + 7 = 12. Write 2 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: 24.85 + 16.37 ------- Step 2: Add the hundredths place: 5 + 7 = 12. Write 2 in the hundredths place and carry over 1 to the tenths place. Step 3: Add the tenths place: 8 + 3 + 1 (carried over) = 12. Write 2 in the tenths place and carry over 1 to the ones place. Step 4: Add the ones place: 4 + 6 + 1 (carried over) = 11. Write 1 in the ones place and carry over 1 to the tens place. Step 5: Add the tens place: 2 + 1 + 1 (carried over) = 4. Write 4 in the tens place. Step 6: Bring down the decimal point. The final answer is $41.22.

4. 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.

5. Emma is buying school supplies. She needs a backpack that costs $32.75, a set of markers for $8.50, and a notebook for $4.25. How much money will Emma spend in total? Answer: 45.50 Solution: - Backpack: $32.75 - Markers: $8.50 - Notebook: $4.25 Set up the addition problem by lining up the decimal points: 32.75 8.50 + 4.25 Add the cents (numbers to the right of the decimal point): 75 cents + 50 cents + 25 cents = 150 cents Since 100 cents = 1 dollar, this equals 1 dollar and 50…
   Full step-by-step solution

   Step 1: Write down all the amounts Emma needs to spend: - Backpack: $32.75 - Markers: $8.50 - Notebook: $4.25 Step 2: Set up the addition problem by lining up the decimal points: 32.75 8.50 + 4.25 Step 3: Add the cents (numbers to the right of the decimal point): 75 cents + 50 cents + 25 cents = 150 cents Since 100 cents = 1 dollar, this equals 1 dollar and 50 cents Step 4: Add the dollars: 32 dollars + 8 dollars + 4 dollars = 44 dollars Step 5: Combine dollars and cents: 44 dollars + 1 dollar (from the cents) = 45 dollars Plus 50 cents = $45.50 Step 6: The total is $45.50 Emma will spend $45.50 in total.

6. $24.75 + $18.60 = ? Answer: 43.35 Solution: Write the numbers vertically, aligning the decimal points: 24.75 + 18.60 Add the hundredths place: 5 + 0 = 5. Write 5 in the hundredths place. Add the tenths place: 7 + 6 = 13.
   Full step-by-step solution

   Step 1: Write the numbers vertically, aligning the decimal points: 24.75 + 18.60 ------- Step 2: Add the hundredths place: 5 + 0 = 5. Write 5 in the hundredths place. Step 3: Add the tenths place: 7 + 6 = 13. Write 3 in the tenths place and carry over 1 to the ones place. Step 4: Add the ones place: 4 + 8 + 1 (carried over) = 13. Write 3 in the ones place and carry over 1 to the tens place. Step 5: Add the tens place: 2 + 1 + 1 (carried over) = 4. Write 4 in the tens place. Step 6: Bring down the decimal point. The final answer is $43.35.

7. Emma is buying art supplies for a school project. She buys a sketchbook for $4.75, colored pencils for $3.25, and watercolor paints for $6.50. How much money did Emma spend in total on her art supplies? Answer: $14.50 Solution: Write down all the amounts Emma spent: $4.75, $3.25, and $6.50 Line up the decimal points and add the hundredths column: 5 + 5 + 0 = 10 hundredths (which is 1 tenth and 0 hundredths) Add the tenths column: 7 + 2 + 5 + 1 (from the hundredths column) = 15 tenths (which is 1 dollar and 5 tenths)…
   Full step-by-step solution

   Step 1: Write down all the amounts Emma spent: $4.75, $3.25, and $6.50 Step 2: Line up the decimal points and add the hundredths column: 5 + 5 + 0 = 10 hundredths (which is 1 tenth and 0 hundredths) Step 3: Add the tenths column: 7 + 2 + 5 + 1 (from the hundredths column) = 15 tenths (which is 1 dollar and 5 tenths) Step 4: Add the dollars column: 4 + 3 + 6 + 1 (from the tenths column) = 14 dollars Step 5: Combine the results: 14 dollars and 50 cents = $14.50 Emma spent $14.50 in total on her art supplies.

8. 3.25 × 4 = ? Answer: 13.00 Solution: We are multiplying a decimal number (3.25) by a whole number (4). 3.25 means 3 whole units and 25 hundredths. Break down 3.25 3.25 = 3 + 0.25 0.25 is the same as 25/100, which simplifies to 1/4.
   Full step-by-step solution

   Let's multiply 3.25 by 4 step by step. Step 1: Understand the problem We are multiplying a decimal number (3.25) by a whole number (4). 3.25 means 3 whole units and 25 hundredths. Step 2: Break down 3.25 3.25 = 3 + 0.25 0.25 is the same as 25/100, which simplifies to 1/4. Step 3: Multiply each part separately First, multiply the whole number part: 3 × 4 = 12 Step 4: Multiply the decimal part: 0.25 × 4 Since 0.25 = 1/4, we can do: (1/4) × 4 = 1 Or directly: 0.25 × 4 = 1.00 Step 5: Add the results 12 + 1.00 = 13.00 Step 6: Check decimal places 3.25 has 2 decimal places. 4 has 0 decimal places. Normally, the product should have 2 decimal places. 13.00 indeed has 2 decimal places, so it matches. Final answer: 13.00

9. Liam is buying supplies for a lemonade stand. A bag of lemons costs $7 and a bag of sugar costs $7. How much more does the bag of lemons cost than the bag of sugar? Answer: 0 Solution: Note the cost of lemons: $7. Step 2: Note the cost of sugar: $7. Step 3: Find the difference: $7 - $7 = $0.
   Full step-by-step solution

   Step 1: Note the cost of lemons: $7. Step 2: Note the cost of sugar: $7. Step 3: Find the difference: $7 - $7 = $0. The bag of lemons costs $0 more than the bag of sugar.