• Welcome
    • The digitizing project
    • What was Childcraft?
      • Organization of Childcraft
      • Getting to know Childcraft
      • Introducing Childcraft in the home
    • Reading to your Child
  • The Books
    • 1 – Once Upon a Time
      • Nursery Rhymes
      • Stories & Poems
      • Folk & Fairy Tales
      • Favorite Fables
      • Things to Know
    • 2 – Time to Read
    • 3 – Stories and Poems
      • Stories
      • Poems
    • 4 – World and Space
      • Our Home, the Earth
      • Oceans, Lakes, and Rivers
      • Air, Wind, Clouds, and Weather
      • Mountains, Valleys, and Plains
      • Planets, Stars, and Galaxies
      • Rocks, Stones, and Petrified Bones
    • 5 – About Animals
      • The Animal Kingdom
      • It’s a Mammal
      • It’s a Bird
      • It’s a Fish
      • It’s a Reptile
      • It’s an Amphibian
      • Many-Legged Creatures
      • Animal Ways
      • The Animals’ World
      • The World of the Sea
      • Staying Alive
      • Living Together
      • Animals of Long Ago
      • Vanishing Animals
      • Domestic Animals
      • People and Animals
    • 6 – The Green Kingdom
      • Seasons of Life
      • Plant Ways
      • Nature’s Neighbors
      • Strange and Surprising Plants
      • How Does Your Garden Grow?
      • Famous Gardens
      • Meet the Trees
      • Plants of Long Ago
      • People and Plants
      • Saving the Plants
      • True Tales and Tall Tales
      • Look for a Lovely Thing
    • 7 – Story of the Sea
      • Animals of the sea
      • Water world
      • Fish
      • Birds
      • Coelenterates
      • Crustaceans
      • Echinoderms
      • Mammals
      • Reptiles
      • Mollusks
      • Sponges, sea squirts, and worms
      • Strange stories of the sea
      • Might and majesty of the sea
      • People and the sea
      • People who work on the sea
    • 8 – About Us
      • Brothers and Sisters, Moms and Dads
      • Fingers and Forks
      • How Do You Know?
      • Let’s Go to My House
      • Living in Two Worlds
    • 9 – Holidays and Birthdays
      • Holiday Time
      • January
      • February
      • March
      • April
      • May
      • June
      • July
      • August
      • September
      • October
      • November
      • December
    • 10 – Places to Know
      • Oh! And ah! Places
      • Queer, Quaint, And Curious Places
      • Seven Wonders Of The Ancient World
      • Treasure Places
      • What’s In A Name?
      • All That’s Left
      • As Good As Old
      • Just For Fun
      • Where Animals Are Famous
      • Where Battles Were Fought
      • Where Land And Water Meet
      • Where Nature Gets In The Way
      • Where People Worship
      • Where They Run A Country
    • 11 – Make and Do
      • Nature Crafts
      • Paint and Print
      • Papier-Mache
      • Puppets and Plays
      • Sew and Stitch
      • Gifts to Give
      • Hook, Weave, Knot, and Braid
      • Let’s Dress Up
      • Let’s Play Games
      • Let’s Play with Clay
    • 12 – How Things Work
      • What’s the Matter?
      • Currents and Sparks
      • Full of Energy
      • Hear All About It
      • Hot and Cold
      • Let’s Get Moving
      • Machines Make It Easy
      • More Things That Work
      • Seeing the Light
    • 13 – Mathemagic
      • How long, how fast, how hot, how heavy?
      • People who work with numbers and shapes
      • Points, lines, shapes, and designs
      • Puzzle fun!
      • What are your chances?
      • What can you do with numbers?
    • 14 – About Me
      • Becoming Me
      • I Speak, I Listen
      • I Wonder, I Think
      • Inside and Outside of Me
      • The Many Me’s
      • There’s Nobody Exactly Like Me
      • Watch Me Grow
      • What Does Me Mean to Me?
      • What I Can Do
    • 15 – Guide to Childcraft
      • The New Baby: Birth to 18 months
      • The Toddler: 18 months to 3 years
      • The Preschooler: 3 to 5 years
      • The School-Age Child: 5 to 8 years
      • The Preteen: 8 to 13 years
      • Health and safety
      • For Special Consideration
      • Medical Guide
  • Random Post
  • Contact
  • Welcome
    • The digitizing project
    • What was Childcraft?
      • Organization of Childcraft
      • Getting to know Childcraft
      • Introducing Childcraft in the home
    • Reading to your Child
  • The Books
    • 1 – Once Upon a Time
      • Nursery Rhymes
      • Stories & Poems
      • Folk & Fairy Tales
      • Favorite Fables
      • Things to Know
    • 2 – Time to Read
    • 3 – Stories and Poems
      • Stories
      • Poems
    • 4 – World and Space
      • Our Home, the Earth
      • Oceans, Lakes, and Rivers
      • Air, Wind, Clouds, and Weather
      • Mountains, Valleys, and Plains
      • Planets, Stars, and Galaxies
      • Rocks, Stones, and Petrified Bones
    • 5 – About Animals
      • The Animal Kingdom
      • It’s a Mammal
      • It’s a Bird
      • It’s a Fish
      • It’s a Reptile
      • It’s an Amphibian
      • Many-Legged Creatures
      • Animal Ways
      • The Animals’ World
      • The World of the Sea
      • Staying Alive
      • Living Together
      • Animals of Long Ago
      • Vanishing Animals
      • Domestic Animals
      • People and Animals
    • 6 – The Green Kingdom
      • Seasons of Life
      • Plant Ways
      • Nature’s Neighbors
      • Strange and Surprising Plants
      • How Does Your Garden Grow?
      • Famous Gardens
      • Meet the Trees
      • Plants of Long Ago
      • People and Plants
      • Saving the Plants
      • True Tales and Tall Tales
      • Look for a Lovely Thing
    • 7 – Story of the Sea
      • Animals of the sea
      • Water world
      • Fish
      • Birds
      • Coelenterates
      • Crustaceans
      • Echinoderms
      • Mammals
      • Reptiles
      • Mollusks
      • Sponges, sea squirts, and worms
      • Strange stories of the sea
      • Might and majesty of the sea
      • People and the sea
      • People who work on the sea
    • 8 – About Us
      • Brothers and Sisters, Moms and Dads
      • Fingers and Forks
      • How Do You Know?
      • Let’s Go to My House
      • Living in Two Worlds
    • 9 – Holidays and Birthdays
      • Holiday Time
      • January
      • February
      • March
      • April
      • May
      • June
      • July
      • August
      • September
      • October
      • November
      • December
    • 10 – Places to Know
      • Oh! And ah! Places
      • Queer, Quaint, And Curious Places
      • Seven Wonders Of The Ancient World
      • Treasure Places
      • What’s In A Name?
      • All That’s Left
      • As Good As Old
      • Just For Fun
      • Where Animals Are Famous
      • Where Battles Were Fought
      • Where Land And Water Meet
      • Where Nature Gets In The Way
      • Where People Worship
      • Where They Run A Country
    • 11 – Make and Do
      • Nature Crafts
      • Paint and Print
      • Papier-Mache
      • Puppets and Plays
      • Sew and Stitch
      • Gifts to Give
      • Hook, Weave, Knot, and Braid
      • Let’s Dress Up
      • Let’s Play Games
      • Let’s Play with Clay
    • 12 – How Things Work
      • What’s the Matter?
      • Currents and Sparks
      • Full of Energy
      • Hear All About It
      • Hot and Cold
      • Let’s Get Moving
      • Machines Make It Easy
      • More Things That Work
      • Seeing the Light
    • 13 – Mathemagic
      • How long, how fast, how hot, how heavy?
      • People who work with numbers and shapes
      • Points, lines, shapes, and designs
      • Puzzle fun!
      • What are your chances?
      • What can you do with numbers?
    • 14 – About Me
      • Becoming Me
      • I Speak, I Listen
      • I Wonder, I Think
      • Inside and Outside of Me
      • The Many Me’s
      • There’s Nobody Exactly Like Me
      • Watch Me Grow
      • What Does Me Mean to Me?
      • What I Can Do
    • 15 – Guide to Childcraft
      • The New Baby: Birth to 18 months
      • The Toddler: 18 months to 3 years
      • The Preschooler: 3 to 5 years
      • The School-Age Child: 5 to 8 years
      • The Preteen: 8 to 13 years
      • Health and safety
      • For Special Consideration
      • Medical Guide
  • Random Post
  • Contact
Mathemagic, What can you do with numbers?

Back and forth and up and down numbers

The number one is more than zero, of course. But can a one ever be less than zero? Yes, it can! Suppose you are standing at the middle of a long line drawn on the ground. Let's call the place...

Manuel
March 3, 2024March 3, 2024
Mathemagic, What can you do with numbers?

The strange row of numbers

Just for fun, a mathematician once made up a puzzle about rabbits. It went like this. Suppose that you have a boy rabbit and a girl rabbit. Each month, your pair of rabbits has a boy rabbit and a...

Manuel
March 3, 2024March 3, 2024
Mathemagic, What can you do with numbers?

Tenths, hundredths, and dots

When you see the number \| you know that it's a fraction. It means one-half of something. But what does 0.5 mean? The number 0.5 is a fraction, too. And it, too, means one-half! How is this...

Manuel
March 3, 2024March 3, 2024
Mathemagic, What can you do with numbers?

Pie puzzles

Fractions are foolers. For this reason, they make good puzzles. Here's a puzzle about different fractions of apple, cherry, and blueberry pie. Would you rather have the one piece of apple, the...

Manuel
March 3, 2024March 3, 2024
Mathemagic, What can you do with numbers?

Tuesday I Was Ten

Tuesday I was ten, and though The fact delights me plenty, It sort of startles me to know I'm now a half of twenty. It's nice to own a bigger bike With brakes along the wheels And figure skates (the...

Manuel
March 3, 2024March 3, 2024
Mathemagic, What can you do with numbers?

Bigger is smaller

If someone asked you whether you would rather have three peppermint sticks or four peppermint sticks, you'd answer "four," of course. Four is more than three. But what if someone asked whether you'd...

Manuel
March 3, 2024March 3, 2024
Mathemagic, What can you do with numbers?

The smallest number

There is no biggest number. But is there a smallest number? Well, the number one is the smallest of the numbers that we count with. But it isn't really the smallest of all numbers. You see, the...

Manuel
March 3, 2024March 3, 2024
Mathemagic, What can you do with numbers?

The biggest number

What's the very biggest number there is? Is it a million? That's one followed by six zeros---1,000,000. No, one million isn't the biggest number. There can be many millions. For example, the earth...

Manuel
March 3, 2024March 3, 2024
Mathemagic, What can you do with numbers?

Building numbers

You have probably put together models of cars and airplanes. You've probably made clay models of animals. But have you ever tried to make a model of a number? Remember, to get a square number, you...

Manuel
March 3, 2024March 3, 2024
Mathemagic, What can you do with numbers?

The foolish millionaire and the clever girl

There was once a very rich and greedy man who loved money more than anything else in the world. He knew he had lots of money, but he didn't know exactly how much. So he hired a little girl to count...

Manuel
March 3, 2024March 3, 2024
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