Skip Counting

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Answer Key & Explanations

Skip Counting · Grade 2 · Worksheet 1

1. A farmer plants apple trees in rows. Each row has 10 trees. If the farmer has 5 rows of apple trees, how many apple trees are there in total? Answer: 50 Solution: The farmer has 5 rows of apple trees, and each row has 10 trees. We need to find the total number of trees. Identify the operation.
   Full step-by-step solution

   Step 1: Understand the problem. The farmer has 5 rows of apple trees, and each row has 10 trees. We need to find the total number of trees. Step 2: Identify the operation. Since each row has the same number of trees, we can multiply the number of rows by the number of trees per row. Step 3: Write the multiplication. Number of rows = 5 Trees per row = 10 Total trees = 5 × 10 Step 4: Perform the multiplication. 5 × 10 = 50 Step 5: State the answer. There are 50 apple trees in total.

2. A bookshelf has 4 shelves. Each shelf has 10 books arranged in a row. How many books are on the bookshelf in total? Answer: 40 Solution: Count the number of shelves: 4 shelves. Count how many books are on each shelf: 10 books. To find the total, add the number of books on each shelf: 10 + 10 + 10 + 10.
   Full step-by-step solution

   Step 1: Count the number of shelves: 4 shelves. Step 2: Count how many books are on each shelf: 10 books. Step 3: To find the total, add the number of books on each shelf: 10 + 10 + 10 + 10. Step 4: 10 + 10 = 20, 20 + 10 = 30, 30 + 10 = 40. The answer is 40.

3. Skip count by 5s: 70, 75, 80, __, 90 Answer: 85 Solution: The pattern is skip counting by 5s, so we add 5 each time. Start at 70. Add 5: 70 + 5 = 75.
   Full step-by-step solution

   Step 1: The pattern is skip counting by 5s, so we add 5 each time. Step 2: Start at 70. Add 5: 70 + 5 = 75. Step 3: Add 5 again: 75 + 5 = 80. Step 4: Add 5 again: 80 + 5 = 85. Step 5: Check: 85 + 5 = 90, which matches the last number given. The answer is 85.

4. Noah is collecting baseball cards. He puts them in pages that hold 10 cards each. If Noah has 7 full pages, how many baseball cards does he have in total? Answer: 70 Solution: Each page holds 10 baseball cards. Noah has 7 full pages. To find the total, count by 10s seven times: 10, 20, 30, 40, 50, 60, 70.
   Full step-by-step solution

   Step 1: Each page holds 10 baseball cards. Step 2: Noah has 7 full pages. Step 3: To find the total, count by 10s seven times: 10, 20, 30, 40, 50, 60, 70. Step 4: 10 × 7 = 70. The answer is 70.

5. 5 + 10 + 15 + 25 = ? Answer: 55 Solution: Start with the first number: 5 Add the second number: 5 + 10 = 15 Add the third number: 15 + 15 = 30 Add the fourth number: 30 + 25 = 55 The answer is 55.
   Full step-by-step solution

   Step 1: Start with the first number: 5 Step 2: Add the second number: 5 + 10 = 15 Step 3: Add the third number: 15 + 15 = 30 Step 4: Add the fourth number: 30 + 25 = 55 The answer is 55.

6. Emma is counting her sticker collection. She has 3 pages with 100 stickers on each page. How many stickers does Emma have in total? Answer: 300 Solution: Emma has 3 pages of stickers. Each page has 100 stickers. To find the total, count by hundreds: 100, 200, 300.
   Full step-by-step solution

   Step 1: Emma has 3 pages of stickers. Step 2: Each page has 100 stickers. Step 3: To find the total, count by hundreds: 100, 200, 300. Step 4: 100 + 100 + 100 = 300. The answer is 300.

7. A classroom has desks arranged in 6 rows. Each row has 10 desks. How many desks are there in total? Answer: 60 Solution: There are 6 rows of desks. Each row has 10 desks. To find the total, count by tens 6 times: 10, 20, 30, 40, 50, 60.
   Full step-by-step solution

   Step 1: There are 6 rows of desks. Step 2: Each row has 10 desks. Step 3: To find the total, count by tens 6 times: 10, 20, 30, 40, 50, 60. Step 4: 10 + 10 + 10 + 10 + 10 + 10 = 60. The answer is 60.