Even and Odd Numbers

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Answer Key & Explanations

Even and Odd Numbers · Grade 2 · Worksheet 1

1. Aroha is helping her mother sort the laundry. She has 47 socks that need to be paired. She wants to know if 47 is an even number or an odd number. Is 47 even or odd? Answer: odd Solution: An even number can be split into two equal groups with none left over. An odd number has one left over when you try to split it into two equal groups. Step 2: Look at the last digit of 47.
   Full step-by-step solution

   Step 1: An even number can be split into two equal groups with none left over. An odd number has one left over when you try to split it into two equal groups. Step 2: Look at the last digit of 47. The last digit is 7. Step 3: Numbers that end in 0, 2, 4, 6, or 8 are even. Numbers that end in 1, 3, 5, 7, or 9 are odd. Step 4: Since 47 ends in 7, it is an odd number. The answer is odd.

2. Is 42 even or odd? Answer: even Solution: Look at the last digit of 42, which is 2. 2 is an even digit, so 42 is even.
   Full step-by-step solution

   Step 1: Look at the last digit of 42, which is 2. Step 2: 2 is an even digit, so 42 is even. The answer is even.

3. A classroom has 4 rows of desks with 6 desks in each row. How many desks are there in total? Answer: 24 Solution: The classroom has 4 rows of desks. Each row contains 6 desks. We need to find the total number of desks.
   Full step-by-step solution

   Step 1: Understand the problem. The classroom has 4 rows of desks. Each row contains 6 desks. We need to find the total number of desks. Step 2: Determine the operation. Since each of the 4 rows has the same number of desks (6), we can find the total by multiplying the number of rows by the number of desks per row. Step 3: Perform the multiplication. Total desks = number of rows × desks per row Total desks = 4 × 6 Step 4: Calculate. 4 × 6 = 24 Step 5: State the final answer. There are 24 desks in total.

4. Aroha is counting her flower pots in the garden. She has 47 pots with red flowers and 39 pots with yellow flowers. Is the total number of flower pots even or odd? Answer: even Solution: Aroha has 47 pots with red flowers and 39 pots with yellow flowers. Both 47 and 39 are odd numbers because they end in 7 and 9, which are odd digits. Add the numbers: 47 + 39 = 86.
   Full step-by-step solution

   Step 1: Aroha has 47 pots with red flowers and 39 pots with yellow flowers. Both 47 and 39 are odd numbers because they end in 7 and 9, which are odd digits. Step 2: Add the numbers: 47 + 39 = 86. Step 3: Look at the last digit of 86. The last digit is 6, which is an even digit (0, 2, 4, 6, 8 are even). Step 4: Therefore, 86 is an even number. The total number of flower pots is even. The answer is even.

5. Emma has 67 marbles in her jar. She wants to know if 67 is an even number or an odd number. Is 67 even or odd? Answer: odd Solution: Look at the last digit of 67, which is 7. Step 2: Even numbers end in 0, 2, 4, 6, or 8. Odd numbers end in 1, 3, 5, 7, or 9.
   Full step-by-step solution

   Step 1: Look at the last digit of 67, which is 7. Step 2: Even numbers end in 0, 2, 4, 6, or 8. Odd numbers end in 1, 3, 5, 7, or 9. Step 3: Since 67 ends in 7, it is an odd number. Step 4: You can also think: if you try to make two equal groups of 67, you would have 33 in each group and 1 left over. That leftover shows it is odd. The answer is odd.

6. A rectangular garden is divided into 4 equal rows. Each row has 8 flowers. How many flowers are in the garden? Answer: 32 Solution: There are 4 rows of flowers. Each row has 8 flowers. To find the total number of flowers, multiply the number of rows by the number of flowers in each row: 4 × 8 4 × 8 = 32 The answer is 32.
   Full step-by-step solution

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

7. A rectangular garden is divided into 4 equal rows of flowers. Each row has 8 flowers. How many flowers are in the garden in total? Answer: 32 Solution: There are 4 rows of flowers. Each row has 8 flowers. To find the total, multiply the number of rows by the number of flowers in each row: 4 × 8 4 × 8 = 32 The answer is 32.
   Full step-by-step solution

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

8. Lily is counting her crayons. She has 24 crayons in her box. Her friend Noah gives her 16 more crayons. How many crayons does Lily have now? Answer: 40 Solution: Lily starts with 24 crayons. Noah gives her 16 more crayons. To find the total number of crayons she has now, we add the crayons she started with to the crayons she received.
   Full step-by-step solution

   Lily starts with 24 crayons. Noah gives her 16 more crayons. To find the total number of crayons she has now, we add the crayons she started with to the crayons she received. Step 1: Write the addition problem. 24 + 16 Step 2: Add the ones place. 4 + 6 = 10 Write down 0 in the ones place, and carry over 1 to the tens place. Step 3: Add the tens place, including the carry over. 2 + 1 + 1 (carry over) = 4 Write down 4 in the tens place. Step 4: Combine the digits. The tens place is 4 and the ones place is 0, so the total is 40. So, Lily now has 40 crayons.