Skip Counting

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Answer Key & Explanations

Skip Counting · Grade 2 · Worksheet 3

1. Maria is counting her crayons. She has 5 crayons in each row and makes 4 rows. How many crayons does Maria have in total? Answer: 20 Solution: Maria has crayons arranged in rows. - There are 4 rows. - Each row has 5 crayons.
   Full step-by-step solution

   Maria has crayons arranged in rows. Let's count them step by step. Step 1: Understand the arrangement. - There are 4 rows. - Each row has 5 crayons. Step 2: Determine the operation. To find the total number of crayons when you have equal groups, you can use multiplication. The total is the number of rows multiplied by the number of crayons in each row. Step 3: Write the multiplication. Total crayons = Number of rows × Crayons per row Total crayons = 4 × 5 Step 4: Perform the calculation. 4 × 5 = 20 Step 5: State the final answer. Maria has 20 crayons 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. A farmer is counting eggs in cartons. Each carton holds 10 eggs. If the farmer has 5 full cartons, how many eggs does he have in total? Answer: 50 Solution: Each carton holds 10 eggs. The farmer has 5 full cartons. We need to find the total number of eggs.
   Full step-by-step solution

   Step 1: Understand the problem. Each carton holds 10 eggs. The farmer has 5 full cartons. We need to find the total number of eggs. Step 2: Determine the operation. Since each carton has the same number of eggs, we multiply the number of cartons by the number of eggs per carton. Step 3: Write the multiplication. Number of cartons = 5 Eggs per carton = 10 Total eggs = 5 × 10 Step 4: Perform the calculation. 5 × 10 = 50 Step 5: State the final answer. The farmer has 50 eggs in total.

4. 272, 282, 292, __, 312 Answer: 302 Solution: Look at the pattern: 272 to 282 is +10, 282 to 292 is +10. So we are skip counting by 10s. Add 10 to 292: 292 + 10 = 302.
   Full step-by-step solution

   Step 1: Look at the pattern: 272 to 282 is +10, 282 to 292 is +10. So we are skip counting by 10s. Step 2: Add 10 to 292: 292 + 10 = 302. Step 3: Check: 302 + 10 = 312, which matches the next number. The answer is 302.

5. Maria is counting her marbles. She arranges them in 4 rows with 10 marbles in each row. How many marbles does Maria have in total? Answer: 40 Solution: Maria arranges her marbles in rows. There are 4 rows. Each row has 10 marbles.
   Full step-by-step solution

   Maria arranges her marbles in rows. Step 1: There are 4 rows. Step 2: Each row has 10 marbles. Step 3: To find the total number of marbles, multiply the number of rows by the number of marbles in each row. Calculation: 4 × 10 = 40. So, Maria has 40 marbles in total.

6. Skip count by 10s: 76, 86, 96, __, 116 Answer: 106 Solution: The pattern is skip counting by 10s, so we add 10 to each number to get the next. Step 2: Start at 96. Step 3: 96 + 10 = 106.
   Full step-by-step solution

   Step 1: The pattern is skip counting by 10s, so we add 10 to each number to get the next. Step 2: Start at 96. Step 3: 96 + 10 = 106. Step 4: Check: 106 + 10 = 116, which matches the next given number. The missing number is 106.