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: ______________

Addition Within 100

Grade 2 · Mathematics · Worksheet 1

  1. 28 + 46 = ? Answer: ______________
  2. A farmer has 47 apples in one basket and 38 apples in another basket. How many apples does the farmer have in total? Answer: ______________
  3. Liam collected 47 seashells at the beach in the morning. In the afternoon, he found 25 more seashells. How many seashells did Liam collect in total? Answer: ______________
  4. Mrs. Johnson's class collected 37 cans for recycling. The next day they collected 45 more cans. How many cans did they collect in total? Answer: ______________
  5. Emma has 56 colored pencils in her art box. For her birthday, her friend Noah gives her 28 more colored pencils. How many colored pencils does Emma have now? Answer: ______________
  6. 37 + 42 = ? Answer: ______________
  7. 78 + ___ = 100 Answer: ______________
  8. 27 + 49 = ? Answer: ______________
  9. Liam has 38 toy cars in his collection. For his birthday, his grandmother gives him 25 more toy cars. How many toy cars does Liam have now? Answer: ______________
  10. 38 + 46 = ? Answer: ______________
lessonbunny.com

Answer Key & Explanations

Addition Within 100 · Grade 2 · Worksheet 1

  1. 28 + 46 = ? Answer: 74 Solution: 28 + 46 Add the ones column: 8 + 6 = 14 Write down the 4 in the ones place and carry over the 1 to the tens column Add the tens column: 2 + 4 + 1 (carried over) = 7 Combine the results: 74 The answer is 74.
    Full step-by-step solution

    Step 1: Write the problem vertically: 28 + 46 ----- Step 2: Add the ones column: 8 + 6 = 14 Step 3: Write down the 4 in the ones place and carry over the 1 to the tens column Step 4: Add the tens column: 2 + 4 + 1 (carried over) = 7 Step 5: Combine the results: 74 The answer is 74.

  2. A farmer has 47 apples in one basket and 38 apples in another basket. How many apples does the farmer have in total? Answer: 85 Solution: Identify the number of apples in each basket. The first basket has 47 apples. The second basket has 38 apples.
    Full step-by-step solution

    Step 1: Identify the number of apples in each basket. The first basket has 47 apples. The second basket has 38 apples. Step 2: To find the total, add the two numbers together. We write the addition: 47 + 38 Step 3: Add the ones (units) place first. 7 ones + 8 ones = 15 ones. 15 ones means 1 ten and 5 ones. Write down the 5 in the ones place and carry over the 1 ten to the tens place. Step 4: Now add the tens place, including the carry-over. Tens place: 4 (from 47) + 3 (from 38) + 1 (carried over) = 8 tens. Step 5: Combine the tens and ones. 8 tens and 5 ones = 85. Step 6: Conclusion. The farmer has 85 apples in total.

  3. Liam collected 47 seashells at the beach in the morning. In the afternoon, he found 25 more seashells. How many seashells did Liam collect in total? Answer: 72 Solution: Liam started with 47 seashells He found 25 more seashells Add the seashells together: 47 + 25 Add the ones place: 7 + 5 = 12 (write 2, carry 1) Add the tens place: 4 + 2 + 1 = 7 Combine the tens and ones: 70 + 2 = 72 The answer is 72.
    Full step-by-step solution

    Step 1: Liam started with 47 seashells Step 2: He found 25 more seashells Step 3: Add the seashells together: 47 + 25 Step 4: Add the ones place: 7 + 5 = 12 (write 2, carry 1) Step 5: Add the tens place: 4 + 2 + 1 = 7 Step 6: Combine the tens and ones: 70 + 2 = 72 The answer is 72.

  4. Mrs. Johnson's class collected 37 cans for recycling. The next day they collected 45 more cans. How many cans did they collect in total? Answer: 82 Solution: Write the numbers vertically to add them: 37 + 45 Add the ones place: 7 + 5 = 12 Write down the 2 in the ones place and carry the 1 to the tens place Add the tens place: 3 + 4 + 1 (the carried number) = 8 Combine the tens and ones: 80 + 2 = 82 The answer is 82.
    Full step-by-step solution

    Step 1: Write the numbers vertically to add them: 37 + 45 Step 2: Add the ones place: 7 + 5 = 12 Step 3: Write down the 2 in the ones place and carry the 1 to the tens place Step 4: Add the tens place: 3 + 4 + 1 (the carried number) = 8 Step 5: Combine the tens and ones: 80 + 2 = 82 The answer is 82.

  5. Emma has 56 colored pencils in her art box. For her birthday, her friend Noah gives her 28 more colored pencils. How many colored pencils does Emma have now? Answer: 84 Solution: Emma starts with 56 colored pencils Noah gives her 28 more colored pencils Add the ones place: 6 + 8 = 14 (write down 4, carry over 1 to the tens place) Add the tens place: 5 + 2 + 1 (carried over) = 8 Combine the tens and ones: 80 + 4 = 84 Emma now has 84 colored pencils.
    Full step-by-step solution

    Step 1: Emma starts with 56 colored pencils Step 2: Noah gives her 28 more colored pencils Step 3: Add the ones place: 6 + 8 = 14 (write down 4, carry over 1 to the tens place) Step 4: Add the tens place: 5 + 2 + 1 (carried over) = 8 Step 5: Combine the tens and ones: 80 + 4 = 84 Emma now has 84 colored pencils.

  6. 37 + 42 = ? Answer: 79 Solution: 37 + 42 Add the ones column: 7 + 2 = 9 Write down the 9 in the ones place Add the tens column: 3 + 4 = 7 Combine the results: 79 The answer is 79.
    Full step-by-step solution

    Step 1: Write the problem vertically: 37 + 42 ----- Step 2: Add the ones column: 7 + 2 = 9 Step 3: Write down the 9 in the ones place Step 4: Add the tens column: 3 + 4 = 7 Step 5: Combine the results: 79 The answer is 79.

  7. 78 + ___ = 100 Answer: 22 Solution: Start with the equation: 78 + ___ = 100 To find the missing number, subtract 78 from 100 100 - 78 = 22 Check: 78 + 22 = 100 The answer is 22.
    Full step-by-step solution

    Step 1: Start with the equation: 78 + ___ = 100 Step 2: To find the missing number, subtract 78 from 100 Step 3: 100 - 78 = 22 Step 4: Check: 78 + 22 = 100 The answer is 22.

  8. 27 + 49 = ? Answer: 76 Solution: 27 + 49 Add the ones column: 7 + 9 = 16 Write down the 6 in the ones place and carry over the 1 to the tens column Add the tens column: 2 + 4 + 1 (carried over) = 7 Combine the results: 76 The answer is 76.
    Full step-by-step solution

    Step 1: Write the problem vertically: 27 + 49 ----- Step 2: Add the ones column: 7 + 9 = 16 Step 3: Write down the 6 in the ones place and carry over the 1 to the tens column Step 4: Add the tens column: 2 + 4 + 1 (carried over) = 7 Step 5: Combine the results: 76 The answer is 76.

  9. Liam has 38 toy cars in his collection. For his birthday, his grandmother gives him 25 more toy cars. How many toy cars does Liam have now? Answer: 63 Solution: Liam started with 38 toy cars His grandmother gave him 25 more toy cars Add the two amounts together: 38 + 25 First add the ones: 8 + 5 = 13 (write down 3, carry over 1) Then add the tens: 3 + 2 + 1 = 6 Combine the tens and ones: 60 + 3 = 63 The answer is 63.
    Full step-by-step solution

    Step 1: Liam started with 38 toy cars Step 2: His grandmother gave him 25 more toy cars Step 3: Add the two amounts together: 38 + 25 Step 4: First add the ones: 8 + 5 = 13 (write down 3, carry over 1) Step 5: Then add the tens: 3 + 2 + 1 = 6 Step 6: Combine the tens and ones: 60 + 3 = 63 The answer is 63.

  10. 38 + 46 = ? Answer: 84 Solution: 38 + 46 Add the ones column: 8 + 6 = 14 Write down the 4 in the ones place and carry over the 1 to the tens column Add the tens column: 3 + 4 + 1 (carried over) = 8 Combine the results: 84 The answer is 84.
    Full step-by-step solution

    Step 1: Write the problem vertically: 38 + 46 ----- Step 2: Add the ones column: 8 + 6 = 14 Step 3: Write down the 4 in the ones place and carry over the 1 to the tens column Step 4: Add the tens column: 3 + 4 + 1 (carried over) = 8 Step 5: Combine the results: 84 The answer is 84.