Mathematics
Kindergarten
10 min
Reasonable answers
Check if an answer makes sense
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1
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? π 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.
2
Key Concepts & Vocabulary
TermDefinitionExample
Reasonable Answer πAn answer that could be true. It makes sense.There are 3 apples in the bowl. That is reasonable.
Silly Answer π€ͺAn answer that cannot be true. It is a funny guess.There are 20 elephants in the car. That is silly!
Guess π€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 βA bigger number or amount.10 is more than 2.
Less βA smaller number or amount.3 is less than 8.
3
Core Formulas
The Look First Rule π
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.
4 more steps in this tutorial
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Challenging
You have a full cup of water π§. 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 π³ 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 π 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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