Subtraction Within 1000

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Subtraction Within 1000 · Grade 3 · Worksheet 2

1. Liam is collecting baseball cards. He has 872 cards in his collection. For his birthday, he gives 158 of his duplicate cards to his younger brother Noah. How many baseball cards does Liam have left in his collection? Answer: 714 Solution: Liam started with 872 baseball cards He gave away 158 cards to his brother To find how many he has left, subtract 158 from 872 872 - 158 = 714 Liam has 714 baseball cards left in his collection The answer is 714.
   Full step-by-step solution

   Step 1: Liam started with 872 baseball cards Step 2: He gave away 158 cards to his brother Step 3: To find how many he has left, subtract 158 from 872 Step 4: 872 - 158 = 714 Step 5: Liam has 714 baseball cards left in his collection The answer is 714.

2. The school library had 842 books on the shelves. During inventory, they discovered that 379 books were checked out by students. How many books were still on the library shelves? Answer: 463 Solution: Start with the total number of books: 842 Subtract the books that were checked out: 379 842 -379 Start with the ones place: 2 - 9 (can't do, so regroup) Borrow 1 from the tens place: 12 - 9 = 3 Move to the tens place: 3 (after borrowing) - 7 (can't do, so regroup) Borrow 1 from the hundreds…
   Full step-by-step solution

   Step 1: Start with the total number of books: 842 Step 2: Subtract the books that were checked out: 379 Step 3: Set up the subtraction problem: 842 -379 Step 4: Start with the ones place: 2 - 9 (can't do, so regroup) Borrow 1 from the tens place: 12 - 9 = 3 Step 5: Move to the tens place: 3 (after borrowing) - 7 (can't do, so regroup) Borrow 1 from the hundreds place: 13 - 7 = 6 Step 6: Move to the hundreds place: 7 (after borrowing) - 3 = 4 Step 7: Combine the results: 400 + 60 + 3 = 463 The answer is 463.

3. Liam has 825 stickers in his collection. He gives 367 stickers to his friend Emma for her birthday. How many stickers does Liam have left? Answer: 458 Solution: Liam starts with 825 stickers. He gives away 367 stickers, so we subtract 367 from 825. 825 - 367 = 458.
   Full step-by-step solution

   Step 1: Liam starts with 825 stickers. Step 2: He gives away 367 stickers, so we subtract 367 from 825. Step 3: 825 - 367 = 458. The answer is 458.

4. 912 - 478 = ? Answer: 434 Solution: Start with the ones place: 2 - 8. Since 2 is smaller than 8, we need to regroup from the tens place. The tens digit is 1, so we regroup 1 ten as 10 ones.
   Full step-by-step solution

   Step 1: Start with the ones place: 2 - 8. Since 2 is smaller than 8, we need to regroup from the tens place. Step 2: The tens digit is 1, so we regroup 1 ten as 10 ones. Now we have 12 ones - 8 ones = 4 ones. Step 3: After regrouping, the tens digit becomes 0 (since we borrowed 1 from the 1 ten). Now we have 0 tens - 7 tens. Since 0 is smaller than 7, we need to regroup from the hundreds place. Step 4: The hundreds digit is 9, so we regroup 1 hundred as 10 tens. Now we have 10 tens - 7 tens = 3 tens. Step 5: After regrouping, the hundreds digit becomes 8. So we have 8 hundreds - 4 hundreds = 4 hundreds. Step 6: Combine the results: 4 hundreds, 3 tens, and 4 ones = 434. The answer is 434.

5. A rectangular garden has a length of 85 meters and a width of 47 meters. A triangular flower bed is removed from the garden. The triangle has a base of 25 meters and a height of 16 meters. What is the remaining area of the garden in square meters? Answer: 3795 Solution: Calculate the area of the rectangular garden. Area of rectangle = length × width = 85 × 47 = 3995 square meters. Calculate the area of the triangular flower bed.
   Full step-by-step solution

   Step 1: Calculate the area of the rectangular garden. Area of rectangle = length × width = 85 × 47 = 3995 square meters. Step 2: Calculate the area of the triangular flower bed. Area of triangle = (1/2) × base × height = (1/2) × 25 × 16 = (1/2) × 400 = 200 square meters. Step 3: Subtract the triangle's area from the rectangle's area to find the remaining area. 3995 - 200 = 3795 square meters. The answer is 3795.

6. 750 - 289 = ? Answer: 461 Solution: Write the problem vertically: 750 - 289 Start with the ones place: 0 - 9, we need to regroup from the tens place The tens place has 5, so we take 1 from it, making it 4, and add 10 to the ones place: 10 - 9 = 1 Move to the tens place: 4 - 8, we need to regroup from the hundreds place The…
   Full step-by-step solution

   Step 1: Write the problem vertically: 750 - 289 Step 2: Start with the ones place: 0 - 9, we need to regroup from the tens place Step 3: The tens place has 5, so we take 1 from it, making it 4, and add 10 to the ones place: 10 - 9 = 1 Step 4: Move to the tens place: 4 - 8, we need to regroup from the hundreds place Step 5: The hundreds place has 7, so we take 1 from it, making it 6, and add 10 to the tens place: 14 - 8 = 6 Step 6: Move to the hundreds place: 6 - 2 = 4 Step 7: Combine the results: 461 The answer is 461.

7. The school library had 823 books. During a book fair, they sold 467 books to students. How many books are left in the library? Answer: 356 Solution: Start with the total number of books: 823 Subtract the books that were sold: 467 823 -467 Start with the ones place: 3 - 7 (can't do, so regroup) Take 1 ten from the tens place, making tens: 2 - 1 = 1, and ones: 13 - 7 = 6 Move to tens place: 1 - 6 (can't do, so regroup) Take 1 hundred from the…
   Full step-by-step solution

   Step 1: Start with the total number of books: 823 Step 2: Subtract the books that were sold: 467 Step 3: Set up the subtraction problem: 823 -467 Step 4: Start with the ones place: 3 - 7 (can't do, so regroup) Step 5: Take 1 ten from the tens place, making tens: 2 - 1 = 1, and ones: 13 - 7 = 6 Step 6: Move to tens place: 1 - 6 (can't do, so regroup) Step 7: Take 1 hundred from the hundreds place, making hundreds: 8 - 1 = 7, and tens: 11 - 6 = 5 Step 8: Move to hundreds place: 7 - 4 = 3 Step 9: The final answer is 356 books remaining.