One-to-One Correspondence

lessonbunny.com

Answer Key & Explanations

One-to-One Correspondence · Kindergarten · Worksheet 2

1. Look at the pattern of hearts: ♥ ♥ ♥ ♥ | ♥ ♥ ♥ ♥ | ♥ ♥ ♥ ♥. How many hearts are there in total? Answer: 12 Solution: Count the hearts in the first group: ♥ ♥ ♥ ♥ = 4 hearts Count the hearts in the second group: ♥ ♥ ♥ ♥ = 4 hearts Count the hearts in the third group: ♥ ♥ ♥ ♥ = 4 hearts Add all the hearts together: 4 + 4 + 4 = 12 The answer is 12.
   Full step-by-step solution

   Step 1: Count the hearts in the first group: ♥ ♥ ♥ ♥ = 4 hearts Step 2: Count the hearts in the second group: ♥ ♥ ♥ ♥ = 4 hearts Step 3: Count the hearts in the third group: ♥ ♥ ♥ ♥ = 4 hearts Step 4: Add all the hearts together: 4 + 4 + 4 = 12 The answer is 12.

2. Mason has 7 toy trains. Each train needs 1 track piece to ride on. How many track pieces does Mason need? Answer: 7 Solution: Mason has 7 toy trains. Each toy train needs exactly 1 track piece. Match each train to one track piece: train 1 needs 1 track, train 2 needs 1 track, and so on for all 7 trains.
   Full step-by-step solution

   Step 1: Mason has 7 toy trains. Step 2: Each toy train needs exactly 1 track piece. Step 3: Match each train to one track piece: train 1 needs 1 track, train 2 needs 1 track, and so on for all 7 trains. Step 4: Counting all the track pieces gives 7 track pieces. The answer is 7.

3. Hana has 11 balloons. She gives 1 balloon to each friend. How many friends get a balloon? Answer: 11 Solution: Hana has 11 balloons. Step 2: She gives 1 balloon to each friend. Step 3: Count the balloons: 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11.
   Full step-by-step solution

   Step 1: Hana has 11 balloons. Step 2: She gives 1 balloon to each friend. Step 3: Count the balloons: 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11. Step 4: Since each friend gets exactly one balloon, the number of friends is the same as the number of balloons. Step 5: 11 balloons means 11 friends get a balloon. The answer is 11.

4. Aroha has 9 flowers. She wants to put each flower in its own vase. How many vases does she need? Answer: 9 Solution: Aroha has 9 flowers. Step 2: Each flower needs its own vase. Step 3: Match each flower to one vase: 1 flower to 1 vase, 2 flowers to 2 vases, and so on.
   Full step-by-step solution

   Step 1: Aroha has 9 flowers. Step 2: Each flower needs its own vase. Step 3: Match each flower to one vase: 1 flower to 1 vase, 2 flowers to 2 vases, and so on. Step 4: Count the flowers: 1, 2, 3, 4, 5, 6, 7, 8, 9. Step 5: She needs 9 vases. The answer is 9.

5. Kaia has 9 balloons. She gives 1 balloon to each friend. How many friends get a balloon? Answer: 9 Solution: Count the balloons: 1, 2, 3, 4, 5, 6, 7, 8, 9. There are 9 balloons. Each friend gets exactly 1 balloon, so the number of friends is the same as the number of balloons.
   Full step-by-step solution

   Step 1: Count the balloons: 1, 2, 3, 4, 5, 6, 7, 8, 9. There are 9 balloons. Step 2: Each friend gets exactly 1 balloon, so the number of friends is the same as the number of balloons. Step 3: 9 balloons means 9 friends each get one balloon. The answer is 9.

6. Look at the pattern of ducks: 🦆 🦆 🦆 🦆 🦆 | 🦆 🦆 🦆 🦆 🦆 | 🦆 🦆 🦆. How many ducks are there in total? Answer: 13 Solution: Count the ducks in the first group: 🦆 🦆 🦆 🦆 🦆 = 5 ducks Count the ducks in the second group: 🦆 🦆 🦆 🦆 🦆 = 5 ducks Count the ducks in the third group: 🦆 🦆 🦆 = 3 ducks Add all the ducks together: 5 + 5 + 3 = 13 The answer is 13.
   Full step-by-step solution

   Step 1: Count the ducks in the first group: 🦆 🦆 🦆 🦆 🦆 = 5 ducks Step 2: Count the ducks in the second group: 🦆 🦆 🦆 🦆 🦆 = 5 ducks Step 3: Count the ducks in the third group: 🦆 🦆 🦆 = 3 ducks Step 4: Add all the ducks together: 5 + 5 + 3 = 13 The answer is 13.

7. Look at the pattern of flowers: 🌸 🌸 🌸 | 🌸 🌸 🌸 | 🌸 🌸. How many flowers are there in total? Answer: 8 Solution: Count the flowers in the first group: 🌸 🌸 🌸 = 3 flowers Count the flowers in the second group: 🌸 🌸 🌸 = 3 flowers Count the flowers in the third group: 🌸 🌸 = 2 flowers Add all the flowers together: 3 + 3 + 2 = 8 The answer is 8.
   Full step-by-step solution

   Step 1: Count the flowers in the first group: 🌸 🌸 🌸 = 3 flowers Step 2: Count the flowers in the second group: 🌸 🌸 🌸 = 3 flowers Step 3: Count the flowers in the third group: 🌸 🌸 = 2 flowers Step 4: Add all the flowers together: 3 + 3 + 2 = 8 The answer is 8.

8. Mere has 15 toy trucks. Each truck needs 1 garage space. How many garage spaces does Mere need? Answer: 15 Solution: Mere has 15 toy trucks. Each truck needs exactly 1 garage space. Match each truck to one garage space: truck 1 gets space 1, truck 2 gets space 2, and so on.
   Full step-by-step solution

   Step 1: Mere has 15 toy trucks. Step 2: Each truck needs exactly 1 garage space. Step 3: Match each truck to one garage space: truck 1 gets space 1, truck 2 gets space 2, and so on. Step 4: Counting all the spaces needed gives 15. The answer is 15.

9. Liam has 3 toy cars. Each toy car needs 1 garage to park in. How many garages does Liam need? Answer: 3 Solution: Liam has 3 toy cars. Each car needs 1 garage. Match each car to one garage: car 1 gets garage 1, car 2 gets garage 2, car 3 gets garage 3.
   Full step-by-step solution

   Step 1: Liam has 3 toy cars. Step 2: Each car needs 1 garage. Step 3: Match each car to one garage: car 1 gets garage 1, car 2 gets garage 2, car 3 gets garage 3. Step 4: Count the garages: 1, 2, 3. The answer is 3.

10. Mason has 7 toy dinosaurs. Each dinosaur needs 1 bowl of food. How many bowls of food does Mason need? Answer: 7 Solution: Mason has 7 toy dinosaurs. Each dinosaur needs exactly 1 bowl of food.
    Full step-by-step solution

    Step 1: Mason has 7 toy dinosaurs. Step 2: Each dinosaur needs exactly 1 bowl of food. Step 3: To find the number of bowls needed, match each dinosaur to one bowl: dinosaur 1 gets bowl 1, dinosaur 2 gets bowl 2, dinosaur 3 gets bowl 3, dinosaur 4 gets bowl 4, dinosaur 5 gets bowl 5, dinosaur 6 gets bowl 6, dinosaur 7 gets bowl 7. Step 4: Count the bowls: 1, 2, 3, 4, 5, 6, 7. That is 7 bowls. The answer is 7.