# The Dot Game

From Montessori Album

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The Dot Game | |
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Math - Arithmetical Operations | |

Level | Primary |

Age | 5+ |

Prerequisites | Addition With the Stamp Game Multiplication With the Stamp Game |

Materials | Dot Game Paper pencil purple or orange pencil |

This activity introduces the child to the 10,000 place value and allows the child a further level of mathematical abstraction in addition and multiplication.

Two versions of printable Dot Game Paper are available below.

## Contents

## Presentation

- Take the material to a table (could also be done on a clipboard).
- Write out an addition problem with several addends.
- Point out the units in the first number.
- Starting from the top left, put dots in the first spaces in the units section.
- Put a line through the units in the first number.
- Do the same with the tens...
- Point out the units in the second number.
- Start filling in dots in the next available units space.
- Then cross out the number.
- Fill in the dots for rest of the numbers in the same way.
- Switch to the purple pencil now.

Count to see that each row has ten dots in it. Cross off a row... - and add a purple dot to the open section below.
- Do the same with any other full rows of dots.
- Point out the dots that are left that do not make up a full row.
- Record that number in the bottom space.
- Point out the purple dots indicating the the full rows of ten units each.
- Add the same number of purple dots to the tens section.
- Cross off groups of 10 tens as was done with the units. Record the remaining tens at the bottom.
- Do the same with the hundreds...
- Move the dots from the thousands to the ten-thousands section.
- Record the number of ten-thousands in the bottom space.
- Write the answer under the original problem.

## Points of Interest

## Control of Error

Teacher subsequently the children

## Variations and Extensions

## Material

### Make Your Own

It's amazing how much some of the suppliers charge for dot game paper. I don't know about you, but I think that 66¢ for a sheet of paper that's going to be used for one math problem is a bit high. Just print your own from one of the PDFs below. You could even laminate a sheet and use it with dry erase markers.

**Printables:**

Dot Game Paper (1 per page) |
Dot Game Paper (2 per page) |

### Where to Buy

Prices and links checked: 23 January 2022

Dry Erase Dot Game Board | |
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Store | Price |

Albanesi | $39.00 |

Alison's | $55.00 |

Alison's | $55.00 |

Kid Advance | $19.99 |

Montessori Outlet | $23.95 |

Nienhuis | $43.10 |

Thinkamajigs | $22.95 |

Dot Game Paper | |
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Store | Price |

Kid Advance 50 sheets |
$4.99 |

Montessori Outlet 50 sheets |
$3.95 |

Nienhuis 50 pages |
$25.40 |