One and Two-Step Problems

lessonbunny.com

Answer Key & Explanations

One and Two-Step Problems · Grade 2 · Worksheet 3

1. Mia had 42 toy cars. Mia got 40 more toy cars for a birthday. Now Mia has 82 toy cars in total. How many toy cars did Mia have before the birthday? Answer: 42 Solution: You know the total is 82 after getting 40 more. To find how many before, subtract the ones added: 82 - 40 = 42.
   Full step-by-step solution

   Step 1: You know the total is 82 after getting 40 more. Step 2: To find how many before, subtract the ones added: 82 - 40 = 42. The answer is 42 toy cars.

2. Liam has 24 stickers. His friend Emma gives him 15 more stickers. How many stickers does Liam have now? Answer: 39 Solution: Liam starts with 24 stickers. Emma gives him 15 more stickers. This means we need to add the new stickers to the ones he already has.
   Full step-by-step solution

   Step 1: Liam starts with 24 stickers. Step 2: Emma gives him 15 more stickers. This means we need to add the new stickers to the ones he already has. Step 3: Write the addition problem: 24 + 15 Step 4: Add the numbers. First, add the numbers in the ones place: 4 + 5 = 9. Write down the 9. Step 5: Next, add the numbers in the tens place: 2 + 1 = 3. Write down the 3 in the tens place. Step 6: Combine the results from the tens and ones places. The 3 from the tens place and the 9 from the ones place make 39. Step 7: Therefore, Liam now has 39 stickers. Final Answer: 39

3. A rectangle is drawn with 4 rows of 8 stars each. How many stars are there in total? Answer: 32 Solution: The rectangle has 4 rows Each row has 8 stars To find the total, multiply the number of rows by the number of stars in each row 4 × 8 = 32 There are 32 stars in total
   Full step-by-step solution

   Step 1: The rectangle has 4 rows Step 2: Each row has 8 stars Step 3: To find the total, multiply the number of rows by the number of stars in each row Step 4: 4 × 8 = 32 Step 5: There are 32 stars in total

4. Emma has 38 stickers. She buys 25 more at the store. Then she gives 17 to her friend. How many stickers does Emma have now? Answer: 46 Solution: Emma starts with 38 stickers and buys 25 more. Add these together: 38 + 25 = 63. Emma then gives 17 stickers to her friend.
   Full step-by-step solution

   Step 1: Emma starts with 38 stickers and buys 25 more. Add these together: 38 + 25 = 63. Step 2: Emma then gives 17 stickers to her friend. Subtract these from the total: 63 - 17 = 46. The answer is 46.

5. 84 - 36 + 19 = ? Answer: 67 Solution: Start with the first operation: 84 - 36 84 - 36 = 48 Now add 19 to the result: 48 + 19 48 + 19 = 67 The answer is 67.
   Full step-by-step solution

   Step 1: Start with the first operation: 84 - 36 Step 2: 84 - 36 = 48 Step 3: Now add 19 to the result: 48 + 19 Step 4: 48 + 19 = 67 The answer is 67.

6. A bakery had 38 cookies. They baked 25 more cookies. Then they sold 17 cookies. How many cookies are left? Answer: 46 Solution: Start with the original number of cookies: 38 Add the cookies that were baked: 38 + 25 = 63 Subtract the cookies that were sold: 63 - 17 = 46 The answer is 46.
   Full step-by-step solution

   Step 1: Start with the original number of cookies: 38 Step 2: Add the cookies that were baked: 38 + 25 = 63 Step 3: Subtract the cookies that were sold: 63 - 17 = 46 The answer is 46.

7. Mrs. Johnson's class has 24 students. She needs to give each student 3 pencils for a math test. How many pencils does she need in total? Answer: 72 Solution: Mrs. Johnson has 24 students, and each student needs 3 pencils. We need to find the total number of pencils.
   Full step-by-step solution

   Step 1: Understand the problem. Mrs. Johnson has 24 students, and each student needs 3 pencils. We need to find the total number of pencils. Step 2: Identify the operation. Since each student gets the same number of pencils, we multiply the number of students by the number of pencils per student. Step 3: Write the multiplication. Total pencils = Number of students × Pencils per student Total pencils = 24 × 3 Step 4: Perform the multiplication. First, multiply 20 × 3 = 60. Then, multiply 4 × 3 = 12. Now add: 60 + 12 = 72. Step 5: State the final answer. Mrs. Johnson needs 72 pencils in total.

8. A toy store had 42 toy cars. They received a new shipment of 28 more toy cars. Then they sold 19 toy cars to customers. How many toy cars are left in the store? Answer: 51 Solution: Start with the original number of toy cars: 42 Add the new shipment of toy cars: 42 + 28 = 70 Subtract the toy cars that were sold: 70 - 19 = 51 The answer is 51.
   Full step-by-step solution

   Step 1: Start with the original number of toy cars: 42 Step 2: Add the new shipment of toy cars: 42 + 28 = 70 Step 3: Subtract the toy cars that were sold: 70 - 19 = 51 The answer is 51.