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Count Within 1000

Grade 2 · Mathematics · Worksheet 3

  1. A rectangular classroom has desks arranged in 7 rows. Each row has 8 desks. How many desks are in the classroom in total? Answer: ______________
  2. Liam is practicing skip counting by 5s. He says, '125, 130, 135, __, 145.' What number is missing from Liam's skip counting pattern? Answer: ______________
  3. What number comes after 789? Answer: ______________
  4. Isabella is counting her collection of colorful buttons. She counts 573 buttons. Then she finds 10 more buttons in her craft box. What number comes after 573 when she continues counting by ones? Answer: ______________
  5. A rectangular garden is divided into 8 equal rows. Each row has 12 flowers. How many flowers are in the garden in total? Answer: ______________
  6. Skip count by 10s: 680, 690, __, 710 Answer: ______________
  7. Skip count by 10s: 720, 730, __, 750 Answer: ______________
  8. Liam collected 35 seashells at the beach in the morning. In the afternoon, he found 28 more seashells. How many seashells did Liam collect in total? Answer: ______________
  9. Emma's class is collecting books for the school library. On Monday, they collected 125 books. On Tuesday, they collected 78 more books. How many books did Emma's class collect in total? Answer: ______________
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Answer Key & Explanations

Count Within 1000 · Grade 2 · Worksheet 3

  1. A rectangular classroom has desks arranged in 7 rows. Each row has 8 desks. How many desks are in the classroom in total? Answer: 56 Solution: The problem tells us there are 7 rows of desks. Each row has 8 desks. To find the total number of desks, we multiply the number of rows by the number of desks in each row.
    Full step-by-step solution

    Step 1: The problem tells us there are 7 rows of desks. Step 2: Each row has 8 desks. Step 3: To find the total number of desks, we multiply the number of rows by the number of desks in each row. Step 4: 7 rows × 8 desks per row = 56 desks. The answer is 56.

  2. Liam is practicing skip counting by 5s. He says, '125, 130, 135, __, 145.' What number is missing from Liam's skip counting pattern? Answer: 140 Solution: Liam is skip counting by 5s, so each number is 5 more than the previous number. Start with 125, add 5 to get 130. Add 5 to 130 to get 135.
    Full step-by-step solution

    Step 1: Liam is skip counting by 5s, so each number is 5 more than the previous number. Step 2: Start with 125, add 5 to get 130. Step 3: Add 5 to 130 to get 135. Step 4: Add 5 to 135 to find the missing number: 135 + 5 = 140. Step 5: Check: 140 + 5 = 145, which matches the pattern. The missing number is 140.

  3. What number comes after 789? Answer: 790 Solution: Start with the number 789. To find the number that comes after, count forward by one. 789 + 1 = 790.
    Full step-by-step solution

    Step 1: Start with the number 789. Step 2: To find the number that comes after, count forward by one. Step 3: 789 + 1 = 790. The number that comes after 789 is 790.

  4. Isabella is counting her collection of colorful buttons. She counts 573 buttons. Then she finds 10 more buttons in her craft box. What number comes after 573 when she continues counting by ones? Answer: 574 Solution: Isabella has 573 buttons. Step 2: She finds 10 more buttons, but the question asks what number comes after 573 when counting by ones, not adding 10. Step 3: When counting by ones, the number after 573 is 574.
    Full step-by-step solution

    Step 1: Isabella has 573 buttons. Step 2: She finds 10 more buttons, but the question asks what number comes after 573 when counting by ones, not adding 10. Step 3: When counting by ones, the number after 573 is 574. Step 4: So the answer is 574.

  5. A rectangular garden is divided into 8 equal rows. Each row has 12 flowers. How many flowers are in the garden in total? Answer: 96 Solution: We have a rectangular garden divided into 8 equal rows. Each row has 12 flowers. We need to find the total number of flowers.
    Full step-by-step solution

    Step 1: Understand the problem. We have a rectangular garden divided into 8 equal rows. Each row has 12 flowers. We need to find the total number of flowers. Step 2: Identify the operation. Since each of the 8 rows has the same number of flowers (12), the total number of flowers is found by multiplying the number of rows by the number of flowers per row. Step 3: Write the multiplication. Total flowers = number of rows × flowers per row Total flowers = 8 × 12 Step 4: Calculate step-by-step. 8 × 12 can be broken down as: 8 × 10 = 80 8 × 2 = 16 Now add: 80 + 16 = 96 Step 5: State the final answer. There are 96 flowers in the garden in total.

  6. Skip count by 10s: 680, 690, __, 710 Answer: 700 Solution: Look at the sequence: 680, 690, __, 710 The pattern is skip counting by 10s (adding 10 each time) 680 + 10 = 690 690 + 10 = 700 700 + 10 = 710 The missing number is 700 The answer is 700.
    Full step-by-step solution

    Step 1: Look at the sequence: 680, 690, __, 710 Step 2: The pattern is skip counting by 10s (adding 10 each time) Step 3: 680 + 10 = 690 Step 4: 690 + 10 = 700 Step 5: 700 + 10 = 710 Step 6: The missing number is 700 The answer is 700.

  7. Skip count by 10s: 720, 730, __, 750 Answer: 740 Solution: Look at the sequence: 720, 730, __, 750 The pattern is skip counting by 10s (adding 10 each time) 720 + 10 = 730 730 + 10 = 740 740 + 10 = 750 The missing number is 740 The answer is 740.
    Full step-by-step solution

    Step 1: Look at the sequence: 720, 730, __, 750 Step 2: The pattern is skip counting by 10s (adding 10 each time) Step 3: 720 + 10 = 730 Step 4: 730 + 10 = 740 Step 5: 740 + 10 = 750 Step 6: The missing number is 740 The answer is 740.

  8. Liam collected 35 seashells at the beach in the morning. In the afternoon, he found 28 more seashells. How many seashells did Liam collect in total? Answer: 63 Solution: Liam collected seashells in two parts: morning and afternoon. We need to find the total. Morning seashells = 35 Afternoon seashells = 28 Decide the operation.
    Full step-by-step solution

    Step 1: Understand the problem. Liam collected seashells in two parts: morning and afternoon. We need to find the total. Step 2: Identify the numbers given. Morning seashells = 35 Afternoon seashells = 28 Step 3: Decide the operation. Since we are combining both amounts, we use addition. Step 4: Write the addition expression. Total seashells = 35 + 28 Step 5: Perform the addition. First, add the ones place: 5 + 8 = 13. Write down 3 in the ones place, carry over 1 to the tens place. Next, add the tens place: 3 + 2 + 1 (carry) = 6. So, 35 + 28 = 63. Step 6: State the final answer. Liam collected 63 seashells in total.

  9. Emma's class is collecting books for the school library. On Monday, they collected 125 books. On Tuesday, they collected 78 more books. How many books did Emma's class collect in total? Answer: 203 Solution: Start with the books collected on Monday: 125 Add the books collected on Tuesday: 78 Add the ones place: 5 + 8 = 13 (write down 3, carry over 1 to the tens place) Add the tens place: 2 + 7 = 9, plus the carried over 1 = 10 (write down 0, carry over 1 to the hundreds place) Add the hundreds…
    Full step-by-step solution

    Step 1: Start with the books collected on Monday: 125 Step 2: Add the books collected on Tuesday: 78 Step 3: Add the ones place: 5 + 8 = 13 (write down 3, carry over 1 to the tens place) Step 4: Add the tens place: 2 + 7 = 9, plus the carried over 1 = 10 (write down 0, carry over 1 to the hundreds place) Step 5: Add the hundreds place: 1 + 0 = 1, plus the carried over 1 = 2 Step 6: Combine all places: 200 + 0 + 3 = 203 The answer is 203.