Count to 120

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Answer Key & Explanations

Count to 120 · Grade 1 · Worksheet 3

1. Lily is counting seashells. Lily says, 'I have 52 seashells.' Then Lily finds 3 more. What number comes right after 52 when Lily counts from 52 to 52 + 3? Answer: 53 Solution: We need to find the next number after 52. When counting forward, the next number is one more. 52 + 1 = 53.
   Full step-by-step solution

   We need to find the next number after 52. When counting forward, the next number is one more. 52 + 1 = 53. So the number that comes after 52 is 53.

2. What number comes after 95? Answer: 96 Solution: Start at 95. Count forward by 1: 95, 96. The number that comes after 95 is 96.
   Full step-by-step solution

   Step 1: Start at 95. Step 2: Count forward by 1: 95, 96. Step 3: The number that comes after 95 is 96. The answer is 96.

3. Liam is counting his toy cars. He has 8 red cars and 7 blue cars. How many toy cars does Liam have in total? Answer: 15 Solution: Identify the number of red cars. Liam has 8 red cars. Identify the number of blue cars.
   Full step-by-step solution

   Step 1: Identify the number of red cars. Liam has 8 red cars. Step 2: Identify the number of blue cars. Liam has 7 blue cars. Step 3: Add the number of red cars and blue cars to find the total. Total cars = red cars + blue cars Total cars = 8 + 7 Step 4: Perform the addition. 8 + 7 = 15 Step 5: State the final answer. Liam has 15 toy cars in total.

4. Moana is counting 59 crayons in a box. Moana takes out 10 crayons. What number comes right before 59 when Moana counts backward from 59 to 59 - 10? Answer: 58 Solution: We need to find the number just before 59. When counting backward, the previous number is one less. 59 - 1 = 58.
   Full step-by-step solution

   We need to find the number just before 59. When counting backward, the previous number is one less. 59 - 1 = 58. So the number that comes before 59 is 58.

5. Harper is counting seashells. Harper says, 'I have 27 seashells.' Then Harper finds 9 more. What number comes right after 27 when Harper counts from 27 to 27 + 9? Answer: 28 Solution: We need to find the next number after 27. When counting forward, the next number is one more. 27 + 1 = 28.
   Full step-by-step solution

   We need to find the next number after 27. When counting forward, the next number is one more. 27 + 1 = 28. So the number that comes after 27 is 28.

6. A pattern of circles is arranged like this: ○ ○ ○ | ○ ○ ○ | ○ ○ ○. How many circles are there in total? Answer: 9 Solution: The circles are arranged as: ○ ○ ○ | ○ ○ ○ | ○ ○ ○ The vertical bars "|" are just separators, not circles. Count the circles in the first group. First group: ○ ○ ○ → 3 circles.
   Full step-by-step solution

   Let's break this down step by step. Step 1: Understand the pattern. The circles are arranged as: ○ ○ ○ | ○ ○ ○ | ○ ○ ○ The vertical bars "|" are just separators, not circles. Step 2: Count the circles in the first group. First group: ○ ○ ○ → 3 circles. Step 3: Count the circles in the second group. Second group: ○ ○ ○ → 3 circles. Step 4: Count the circles in the third group. Third group: ○ ○ ○ → 3 circles. Step 5: Add them together. 3 + 3 + 3 = 9. Step 6: Conclusion. There are 9 circles in total. ANSWER: 9

7. 25 + 17 = ? Answer: 42 Solution: Write the numbers vertically, aligning the ones and tens places. 25 + 17 Add the digits in the ones column (rightmost column). 5 + 7 = 12 Since 12 is a two-digit number, we separate it into 10 and 2.
   Full step-by-step solution

   Let's add 25 and 17 step-by-step. Step 1: Write the numbers vertically, aligning the ones and tens places. 25 + 17 Step 2: Add the digits in the ones column (rightmost column). 5 + 7 = 12 Step 3: Since 12 is a two-digit number, we separate it into 10 and 2. We write down the 2 in the ones place of the answer and carry over the 1 (which represents 10) to the tens column. Step 4: Now add the digits in the tens column, including the carry-over. 2 + 1 + 1 = 4 (The 2 is from 25, the 1 is from 17, and the last 1 is the carry-over from the ones column.) Step 5: Write the result from the tens column next to the 2 from the ones column. The answer is 42. So, 25 + 17 = 42.

8. 120 - 100 = ? Answer: 20 Solution: We are solving: 120 - 100 = ? Write the problem clearly. We have 120 minus 100.
   Full step-by-step solution

   We are solving: 120 - 100 = ? Step 1: Write the problem clearly. We have 120 minus 100. Step 2: Break down the numbers by place value. 120 means 1 hundred, 2 tens, and 0 ones. 100 means 1 hundred, 0 tens, and 0 ones. Step 3: Subtract the hundreds place. 1 hundred minus 1 hundred = 0 hundreds. Step 4: Subtract the tens place. 2 tens minus 0 tens = 2 tens. Step 5: Subtract the ones place. 0 ones minus 0 ones = 0 ones. Step 6: Combine the results. 0 hundreds, 2 tens, and 0 ones = 20. Step 7: Check by addition (to verify subtraction). 20 + 100 = 120, which matches the original number. Final answer: 20

9. Emma is collecting seashells at the beach. She finds 25 shells in the morning and 15 more shells in the afternoon. How many seashells does Emma have in total? Answer: 40 Solution: Emma starts with 25 seashells from the morning. She finds 15 more seashells in the afternoon. Add the two amounts together: 25 + 15 25 + 15 = 40 Emma has 40 seashells in total.
   Full step-by-step solution

   Step 1: Emma starts with 25 seashells from the morning. Step 2: She finds 15 more seashells in the afternoon. Step 3: Add the two amounts together: 25 + 15 Step 4: 25 + 15 = 40 Emma has 40 seashells in total.