Mathematics Kindergarten 10 min

Reasonable answers

Check if an answer makes sense

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Introduction & Learning Objectives

Learning Objectives Identify an answer that 'makes sense'. Spot an answer that is 'silly' or impossible. Choose a reasonable number from two choices. Use visual clues to make a good guess. Explain their choice using words like 'more' or 'less'. Connect guessing to counting small groups. Does a dog have 10 legs? πŸ• No! That's silly! Let's find answers that make sense. We will learn to make good guesses. This is called finding a reasonable answer. It helps us think about numbers. Real-World Applications Guessing how many toys are in a box. Thinking about how many snacks to get. Deciding if there are a few or many birds outside. Guessing how many steps to the door.
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Key Concepts & Vocabulary

TermDefinitionExample Reasonable Answer πŸ‘An answer that could be true. It makes sense.There are 3 apples in the bowl. That is reasonable. Silly Answer πŸ€ͺAn answer that cannot be true. It is a funny guess.There are 20 elephants in the car. That is silly! Guess πŸ€”To think of an answer without counting exactly.I guess there are 5 blocks on the floor. AboutA word that means 'close to' a number.There are about 4 crayons in the cup. More βž•A bigger number or amount.10 is more than 2. Less βž–A smaller number or amount.3 is less than 8.
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Core Formulas

The Look First Rule πŸ‘€ Eyes First -> Brain Thinks -> Mouth Talks Always look at the group of things before you guess a number. The Small or Big Rule Small Group = Small Number. Big Group = Big Number. If you see a few things, guess a small number like 2, 3, or 4. If you see many things, guess a bigger number like 10 or 15.

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Sample Practice Questions

Challenging
You have a full cup of water πŸ’§. You pour about half of it out. What is a reasonable guess for how many drops of water are left in the cup?
A.1
B.5
C.50
D.500
Challenging
A big tree 🌳 has thousands of leaves. In the fall, most of the leaves fall down. Which is a reasonable number of leaves left on the tree?
A.1,000
B.500
C.10
D.5,000
Challenging
A storybook πŸ“– is about as thick as your finger is long. It has pictures on about half the pages. What is a reasonable number of pictures in the book?
A.2
B.15
C.100
D.200

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