Worksheet 1Worksheet 2Worksheet 3

The download includes this worksheet followed by the answer key with explanations. In the print dialog choose “Save as PDF” to download.

lessonbunny.com
Name: ______________________________ Date: ______________

Add/Subtract Decimals

Grade 4 · Decimals · Worksheet 3

  1. Emma is tracking her family's road trip. On Monday they drove 245.75 miles, and on Tuesday they drove 189.25 miles. How many total miles did Emma's family drive during these two days? Answer: ______________
  2. Matiu had 10 dollars. Then Matiu spent 6 dollars at the store. How much money does Matiu have left? Answer: ______________
  3. A rectangular garden is drawn with length 12.5 meters and width 8.75 meters. What is the total distance around the garden?
    Answer: ______________
  4. 12.75 + 8.25 = ? Answer: ______________
  5. Maria is buying school supplies. She finds a notebook for $3.75 and a pack of pens for $2.50. If she pays with a $10 bill, how much change will she receive? Answer: ______________
  6. Tane had a piece of ribbon that was 28 centimeters long. After cutting off 1 centimeters to give to a friend, how long is the ribbon that Tane has left? Answer: ______________
  7. 24.38 + 15.67 = ? Answer: ______________
  8. 15.60 - 8.75 = ? Answer: ______________
lessonbunny.com

Answer Key & Explanations

Add/Subtract Decimals · Grade 4 · Worksheet 3

  1. Emma is tracking her family's road trip. On Monday they drove 245.75 miles, and on Tuesday they drove 189.25 miles. How many total miles did Emma's family drive during these two days? Answer: 435.00 Solution: Monday: 245.75 miles Tuesday: 189.25 miles 245 + 189 = 434 0.75 + 0.25 = 1.00 434 + 1.00 = 435.00 Emma's family drove 435.00 miles total during these two days.
    Full step-by-step solution

    Step 1: Write down the distances driven each day Monday: 245.75 miles Tuesday: 189.25 miles Step 2: Add the whole number parts 245 + 189 = 434 Step 3: Add the decimal parts 0.75 + 0.25 = 1.00 Step 4: Combine the results 434 + 1.00 = 435.00 Emma's family drove 435.00 miles total during these two days.

  2. Matiu had 10 dollars. Then Matiu spent 6 dollars at the store. How much money does Matiu have left? Answer: 4 Solution: Start with 10 dollars. Subtract the amount spent: 10 - 6 = 4. Matiu has 4 dollars left.
    Full step-by-step solution

    Step 1: Start with 10 dollars. Step 2: Subtract the amount spent: 10 - 6 = 4. Matiu has 4 dollars left.

  3. A rectangular garden is drawn with length 12.5 meters and width 8.75 meters. What is the total distance around the garden? Answer: 42.5 Solution: To find the total distance around the garden, we need to calculate the perimeter of the rectangle. Recall the formula for the perimeter of a rectangle. The perimeter P is given by: P = 2 * (length + width) Identify the given measurements from the problem.
    Full step-by-step solution

    To find the total distance around the garden, we need to calculate the perimeter of the rectangle. Step 1: Recall the formula for the perimeter of a rectangle. The perimeter P is given by: P = 2 * (length + width) Step 2: Identify the given measurements from the problem. Length = 12.5 meters Width = 8.75 meters Step 3: Substitute the given values into the formula. P = 2 * (12.5 + 8.75) Step 4: Perform the addition inside the parentheses. 12.5 + 8.75 = 21.25 Step 5: Multiply the result by 2. P = 2 * 21.25 P = 42.5 Step 6: State the final answer with the correct unit. The total distance around the garden is 42.5 meters. Therefore, the correct answer is 42.5.

  4. 12.75 + 8.25 = ? Answer: 21.00 Solution: Write the numbers one above the other, aligning the decimal points. 12.75 + 8.25 Start adding from the rightmost column (hundredths place). The hundredths column: 5 (from 12.75) + 5 (from 8.25) = 10.
    Full step-by-step solution

    Let's add 12.75 and 8.25 step-by-step. Step 1: Write the numbers one above the other, aligning the decimal points. 12.75 + 8.25 --------- Step 2: Start adding from the rightmost column (hundredths place). The hundredths column: 5 (from 12.75) + 5 (from 8.25) = 10. Write down 0 in the hundredths place, and carry over 1 to the tenths place. Step 3: Add the tenths place, including the carry-over. Tenths column: 7 (from 12.75) + 2 (from 8.25) + 1 (carried over) = 10. Write down 0 in the tenths place, and carry over 1 to the units (ones) place. Step 4: Add the units (ones) place, including the carry-over. Units column: 2 (from 12.75) + 8 (from 8.25) + 1 (carried over) = 11. Write down 1 in the units place, and carry over 1 to the tens place. Step 5: Add the tens place, including the carry-over. Tens column: 1 (from 12.75) + 0 (from 8.25, since there is no digit) + 1 (carried over) = 2. Write down 2 in the tens place. Step 6: Combine all digits, placing the decimal point in the same aligned position. We have: 2 (tens), 1 (units), decimal point, 0 (tenths), 0 (hundredths) → 21.00 Final Answer: 21.00

  5. Maria is buying school supplies. She finds a notebook for $3.75 and a pack of pens for $2.50. If she pays with a $10 bill, how much change will she receive? Answer: 3.75 Solution: First, find the total cost of the supplies. The notebook costs $3.75 and the pens cost $2.50. 3.75 + 2.50 = 6.25 Maria pays with a $10 bill.
    Full step-by-step solution

    First, find the total cost of the supplies. The notebook costs $3.75 and the pens cost $2.50. Add them together: 3.75 + 2.50 = 6.25 Maria pays with a $10 bill. To find the change, subtract the total cost from the amount she paid: 10.00 - 6.25 = 3.75 So, Maria will receive $3.75 in change.

  6. Tane had a piece of ribbon that was 28 centimeters long. After cutting off 1 centimeters to give to a friend, how long is the ribbon that Tane has left? Answer: 27 Solution: The original ribbon length is 28 centimeters. Subtract the piece cut off: 28 - 1 = 27. Tane has 27 centimeters of ribbon left.
    Full step-by-step solution

    Step 1: The original ribbon length is 28 centimeters. Step 2: Subtract the piece cut off: 28 - 1 = 27. Tane has 27 centimeters of ribbon left.

  7. 24.38 + 15.67 = ? Answer: 40.05 Solution: 24.38 + 15.67 Add the hundredths place: 8 + 7 = 15. Write down 5 and carry over 1 to the tenths place. Add the tenths place: 3 + 6 + 1 (carry over) = 10.
    Full step-by-step solution

    Step 1: Write the numbers with aligned decimal points: 24.38 + 15.67 Step 2: Add the hundredths place: 8 + 7 = 15. Write down 5 and carry over 1 to the tenths place. Step 3: Add the tenths place: 3 + 6 + 1 (carry over) = 10. Write down 0 and carry over 1 to the ones place. Step 4: Add the ones place: 4 + 5 + 1 (carry over) = 10. Write down 0 and carry over 1 to the tens place. Step 5: Add the tens place: 2 + 1 + 1 (carry over) = 4. Step 6: Bring down the decimal point. Step 7: The final answer is 40.05.

  8. 15.60 - 8.75 = ? Answer: 6.85 Solution: Write the numbers vertically, aligning the decimal points: 15.60 - 8.75 Start subtracting from the rightmost column (hundredths place). We have 0 - 5. Since 0 is less than 5, we need to regroup.
    Full step-by-step solution

    Step 1: Write the numbers vertically, aligning the decimal points: 15.60 - 8.75 Step 2: Start subtracting from the rightmost column (hundredths place). We have 0 - 5. Since 0 is less than 5, we need to regroup. Step 3: Look to the tenths place. We have 6 tenths. Take 1 tenth from 6, leaving 5 tenths. Convert that 1 tenth to 10 hundredths. Now we have 10 hundredths - 5 hundredths = 5 hundredths. Step 4: Move to the tenths place: 5 tenths - 7 tenths. Since 5 is less than 7, we need to regroup again. Step 5: Look to the ones place. We have 5 ones. Take 1 one from 5, leaving 4 ones. Convert that 1 one to 10 tenths. Now we have 15 tenths - 7 tenths = 8 tenths. Step 6: Move to the ones place: 4 ones - 8 ones. Since 4 is less than 8, we need to regroup from the tens place. Step 7: Look to the tens place. We have 1 ten. Take 1 ten from 1, leaving 0 tens. Convert that 1 ten to 10 ones. Now we have 14 ones - 8 ones = 6 ones. Step 8: The tens place has 0 tens, so we're done. Step 9: Bring down the decimal point. Final calculation: 15.60 - 8.75 = 6.85