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Number Sequence to 20

Kindergarten · Mathematics · Worksheet 1

  1. Lily sees a number line on the wall. The numbers go: 6, 7, ____. What is the missing number? Answer: ______________
  2. Emma has 7 stickers on her notebook. Her teacher gives her 5 more stickers for doing good work. How many stickers does Emma have now? Answer: ______________
  3. What comes after 12? Answer: ______________
  4. 8, 9, _, 11, 12 Answer: ______________
  5. What number comes after 4? Answer: ______________
  6. What number comes after 9? Answer: ______________
  7. Emma has 7 stickers on her notebook. Her teacher gives her 5 more stickers. How many stickers does Emma have now? Answer: ______________
  8. Look at the pattern: 🟦 🟦 🟦 🟦 | 🟦 🟦 🟦 🟦 | 🟦 🟦 🟦 🟦 | 🟦 🟦. How many blue squares are there in total? Answer: ______________
  9. 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, _, 20 Answer: ______________
  10. Tane sees a number line on the wall. The numbers go: 1, 2, ____. What is the missing number? Answer: ______________
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Answer Key & Explanations

Number Sequence to 20 · Kindergarten · Worksheet 1

  1. Lily sees a number line on the wall. The numbers go: 6, 7, ____. What is the missing number? Answer: 8 Solution: Look at the two numbers we know: 6 and 7. The numbers go up by 1 each time. From 6 to 7 is +1.
    Full step-by-step solution

    Step 1: Look at the two numbers we know: 6 and 7. Step 2: The numbers go up by 1 each time. From 6 to 7 is +1. Step 3: So the missing number must be 7 + 1 = 8. The answer is 8.

  2. Emma has 7 stickers on her notebook. Her teacher gives her 5 more stickers for doing good work. How many stickers does Emma have now? Answer: 12 Solution: Emma starts with 7 stickers. She gets 5 more stickers from her teacher. Add the stickers together: 7 + 5 7 + 5 = 12 Emma has 12 stickers now.
    Full step-by-step solution

    Step 1: Emma starts with 7 stickers. Step 2: She gets 5 more stickers from her teacher. Step 3: Add the stickers together: 7 + 5 Step 4: 7 + 5 = 12 Emma has 12 stickers now.

  3. What comes after 12? Answer: 13 Solution: Start counting from 12. The next number in the counting sequence is 13.
    Full step-by-step solution

    Step 1: Start counting from 12. Step 2: The next number in the counting sequence is 13. The answer is 13.

  4. 8, 9, _, 11, 12 Answer: 10 Solution: Look at the sequence: 8, 9, _, 11, 12 Notice that 8 comes before 9, and 11 comes before 12 The numbers are counting up by ones: 8, 9, 10, 11, 12 The missing number is 10 The answer is 10.
    Full step-by-step solution

    Step 1: Look at the sequence: 8, 9, _, 11, 12 Step 2: Notice that 8 comes before 9, and 11 comes before 12 Step 3: The numbers are counting up by ones: 8, 9, 10, 11, 12 Step 4: The missing number is 10 The answer is 10.

  5. What number comes after 4? Answer: 5 Solution: When counting up, the number after 4 is 5.
  6. What number comes after 9? Answer: 10 Solution: When counting up, the number after 9 is 10.
  7. Emma has 7 stickers on her notebook. Her teacher gives her 5 more stickers. How many stickers does Emma have now? Answer: 12 Solution: Emma starts with 7 stickers. She gets 5 more stickers from her teacher. Add the stickers together: 7 + 5 7 + 5 = 12 Emma has 12 stickers now.
    Full step-by-step solution

    Step 1: Emma starts with 7 stickers. Step 2: She gets 5 more stickers from her teacher. Step 3: Add the stickers together: 7 + 5 Step 4: 7 + 5 = 12 Emma has 12 stickers now.

  8. Look at the pattern: 🟦 🟦 🟦 🟦 | 🟦 🟦 🟦 🟦 | 🟦 🟦 🟦 🟦 | 🟦 🟦. How many blue squares are there in total? Answer: 14 Solution: Count the squares in the first group: 🟦 🟦 🟦 🟦 = 4 squares Count the squares in the second group: 🟦 🟦 🟦 🟦 = 4 squares Count the squares in the third group: 🟦 🟦 🟦 🟦 = 4 squares Count the squares in the fourth group: 🟦 🟦 = 2 squares Add all the squares together: 4 + 4 + 4 + 2 = 14 The…
    Full step-by-step solution

    Step 1: Count the squares in the first group: 🟦 🟦 🟦 🟦 = 4 squares Step 2: Count the squares in the second group: 🟦 🟦 🟦 🟦 = 4 squares Step 3: Count the squares in the third group: 🟦 🟦 🟦 🟦 = 4 squares Step 4: Count the squares in the fourth group: 🟦 🟦 = 2 squares Step 5: Add all the squares together: 4 + 4 + 4 + 2 = 14 The answer is 14.

  9. 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, _, 20 Answer: 19 Solution: Look at the sequence: 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, _, 20 Notice that the numbers are counting up from 1 to 20 in order The number before the blank is 18, and the number after the blank is 20 The number that comes after 18 when counting is 19 Check: 18, 19, 20 -…
    Full step-by-step solution

    Step 1: Look at the sequence: 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, _, 20 Step 2: Notice that the numbers are counting up from 1 to 20 in order Step 3: The number before the blank is 18, and the number after the blank is 20 Step 4: The number that comes after 18 when counting is 19 Step 5: Check: 18, 19, 20 - this is the correct counting order The answer is 19.

  10. Tane sees a number line on the wall. The numbers go: 1, 2, ____. What is the missing number? Answer: 3 Solution: Look at the two numbers we know: 1 and 2. The numbers go up by 1 each time. From 1 to 2 is +1.
    Full step-by-step solution

    Step 1: Look at the two numbers we know: 1 and 2. Step 2: The numbers go up by 1 each time. From 1 to 2 is +1. Step 3: So the missing number must be 2 + 1 = 3. The answer is 3.