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Elementary Math Review

A no-prep board covering place value, operations, fractions, geometry, and measurement.

Swipe the board sideways · 5 categories

Elementary Math Review
Place ValueOperationsFractionsGeometryMeasurement
100The value of the 4 in 4,21910045 plus 37100One half written with a denominator of 8100A polygon with three sides100The number of centimeters in one meter
2008,736 rounded to the nearest hundred20096 minus 58200The larger fraction: 2/3 or 2/5200An angle smaller than 90 degrees200The number of minutes in two hours
300The number written as 5,000 + 300 + 20 + 63009 multiplied by 7300The numerator in the fraction 7/10300The number of faces on a cube300The area of a 6 cm by 4 cm rectangle
400The digit in the tens place of 91,284400144 divided by 12400One whole minus one quarter400A quadrilateral with two pairs of parallel sides400The most suitable metric unit for the mass of an apple
500Which number is the smallest nonnegative integer?500The missing number in 6 multiplied by this number equals 54500The fraction of 12 objects represented by 3 objects500A line segment from the center of a circle to its edge500The volume of a 3 by 2 by 4 rectangular prism

Ages 8 to 11 · 25 of 25 clues written · final round · about 20 minutes

Open it in the maker

7 of 26 answers carry the sentence they were checked against · 19 make no factual claim

Play time assumes about 40 seconds a clue plus three minutes for the final round. Nothing is saved to a server and no account is needed. How answers are checked.

Player sheet

Elementary Math Review · Ages 8 to 11 · answers are on the host key

Place Value

  1. 100 The value of the 4 in 4,219
  2. 200 8,736 rounded to the nearest hundred
  3. 300 The number written as 5,000 + 300 + 20 + 6
  4. 400 The digit in the tens place of 91,284
  5. 500 Which number is the smallest nonnegative integer?

Operations

  1. 100 45 plus 37
  2. 200 96 minus 58
  3. 300 9 multiplied by 7
  4. 400 144 divided by 12
  5. 500 The missing number in 6 multiplied by this number equals 54

Fractions

  1. 100 One half written with a denominator of 8
  2. 200 The larger fraction: 2/3 or 2/5
  3. 300 The numerator in the fraction 7/10
  4. 400 One whole minus one quarter
  5. 500 The fraction of 12 objects represented by 3 objects

Geometry

  1. 100 A polygon with three sides
  2. 200 An angle smaller than 90 degrees
  3. 300 The number of faces on a cube
  4. 400 A quadrilateral with two pairs of parallel sides
  5. 500 A line segment from the center of a circle to its edge

Measurement

  1. 100 The number of centimeters in one meter
  2. 200 The number of minutes in two hours
  3. 300 The area of a 6 cm by 4 cm rectangle
  4. 400 The most suitable metric unit for the mass of an apple
  5. 500 The volume of a 3 by 2 by 4 rectangular prism

Final round: Number Sense

This number is both a factor of 24 and a multiple of 6, and it lies between 10 and 20.

Host key

Elementary Math Review · keep this sheet · it carries the answers

Place Value

  1. 100 The value of the 4 in 4,219 Response: 4,000Self-contained calculation or judgment; no external factual claim.
  2. 200 8,736 rounded to the nearest hundred Response: 8,700Self-contained calculation or judgment; no external factual claim.
  3. 300 The number written as 5,000 + 300 + 20 + 6 Response: 5,326Self-contained calculation or judgment; no external factual claim.
  4. 400 The digit in the tens place of 91,284 Response: 8Self-contained calculation or judgment; no external factual claim.
  5. 500 Which number is the smallest nonnegative integer? Response: 0Checked against: The number 0 is the smallest nonnegative integer, and the largest nonpositive integer.Source: https://en.wikipedia.org/w/index.php?title=0&oldid=1363928870

Operations

  1. 100 45 plus 37 Response: 82Self-contained calculation or judgment; no external factual claim.
  2. 200 96 minus 58 Response: 38Self-contained calculation or judgment; no external factual claim.
  3. 300 9 multiplied by 7 Response: 63Self-contained calculation or judgment; no external factual claim.
  4. 400 144 divided by 12 Response: 12Self-contained calculation or judgment; no external factual claim.
  5. 500 The missing number in 6 multiplied by this number equals 54 Response: 9Self-contained calculation or judgment; no external factual claim.

Fractions

  1. 100 One half written with a denominator of 8 Response: 4/8Self-contained calculation or judgment; no external factual claim.
  2. 200 The larger fraction: 2/3 or 2/5 Response: 2/3Self-contained calculation or judgment; no external factual claim.
  3. 300 The numerator in the fraction 7/10 Response: 7Self-contained calculation or judgment; no external factual claim.
  4. 400 One whole minus one quarter Response: 3/4Self-contained calculation or judgment; no external factual claim.
  5. 500 The fraction of 12 objects represented by 3 objects Response: 3/12 or 1/4Self-contained calculation or judgment; no external factual claim.

Geometry

  1. 100 A polygon with three sides Response: A triangleChecked against: A triangle or trigon is a polygon consisting of three sides connected at three corners.Source: https://en.wikipedia.org/w/index.php?title=Triangle&oldid=1365649475
  2. 200 An angle smaller than 90 degrees Response: An acute angleChecked against: An angle smaller than a right angle (less than 90°) is called an acute angle.Source: https://en.wikipedia.org/w/index.php?title=Angle&oldid=1356827812
  3. 300 The number of faces on a cube Response: 6Checked against: A cube has 8 corners, 12 edges and 6 faces, as in the most usual kind of dice.Source: https://simple.wikipedia.org/w/index.php?title=Cube&oldid=9090456
  4. 400 A quadrilateral with two pairs of parallel sides Response: A parallelogramChecked against: In Euclidean geometry, a parallelogram is a chiral simple (non-self-intersecting) quadrilateral with two pairs of parallel sides.Source: https://en.wikipedia.org/w/index.php?title=Parallelogram&oldid=1358605082
  5. 500 A line segment from the center of a circle to its edge Response: A radiusChecked against: A radius is a line segment connecting a point on the circle and the center of the circle.Source: https://en.wikibooks.org/w/index.php?title=Geometry%2FChapter_7&oldid=4493592

Measurement

  1. 100 The number of centimeters in one meter Response: 100Checked against: Equivalently, there are 100 centimetres in 1 metre.Source: https://en.wikipedia.org/w/index.php?title=Centimetre&oldid=1356186267
  2. 200 The number of minutes in two hours Response: 120Self-contained calculation; no external factual claim.
  3. 300 The area of a 6 cm by 4 cm rectangle Response: 24 square centimetersSelf-contained calculation or judgment; no external factual claim.
  4. 400 The most suitable metric unit for the mass of an apple Response: GramsSelf-contained calculation or judgment; no external factual claim.
  5. 500 The volume of a 3 by 2 by 4 rectangular prism Response: 24 cubic unitsSelf-contained calculation or judgment; no external factual claim.

Final round: Number Sense

This number is both a factor of 24 and a multiple of 6, and it lies between 10 and 20. Response: 12Self-contained calculation from the quantities in the clue; no external factual claim.

Every clue, every answer, and what it was checked against

This is what prints on the host key.

Place Value

  1. The value of the 4 in 4,219 100

    4,000Self-contained calculation or judgment; no external factual claim.

  2. 8,736 rounded to the nearest hundred 200

    8,700Self-contained calculation or judgment; no external factual claim.

  3. The number written as 5,000 + 300 + 20 + 6 300

    5,326Self-contained calculation or judgment; no external factual claim.

  4. The digit in the tens place of 91,284 400

    8Self-contained calculation or judgment; no external factual claim.

  5. Which number is the smallest nonnegative integer? 500

    0Checked against: The number 0 is the smallest nonnegative integer, and the largest nonpositive integer.Source, pinned revision

Operations

  1. 45 plus 37 100

    82Self-contained calculation or judgment; no external factual claim.

  2. 96 minus 58 200

    38Self-contained calculation or judgment; no external factual claim.

  3. 9 multiplied by 7 300

    63Self-contained calculation or judgment; no external factual claim.

  4. 144 divided by 12 400

    12Self-contained calculation or judgment; no external factual claim.

  5. The missing number in 6 multiplied by this number equals 54 500

    9Self-contained calculation or judgment; no external factual claim.

Fractions

  1. One half written with a denominator of 8 100

    4/8Self-contained calculation or judgment; no external factual claim.

  2. The larger fraction: 2/3 or 2/5 200

    2/3Self-contained calculation or judgment; no external factual claim.

  3. The numerator in the fraction 7/10 300

    7Self-contained calculation or judgment; no external factual claim.

  4. One whole minus one quarter 400

    3/4Self-contained calculation or judgment; no external factual claim.

  5. The fraction of 12 objects represented by 3 objects 500

    3/12 or 1/4Self-contained calculation or judgment; no external factual claim.

Geometry

  1. A polygon with three sides 100

    A triangleChecked against: A triangle or trigon is a polygon consisting of three sides connected at three corners.Source, pinned revision

  2. An angle smaller than 90 degrees 200

    An acute angleChecked against: An angle smaller than a right angle (less than 90°) is called an acute angle.Source, pinned revision

  3. The number of faces on a cube 300

    6Checked against: A cube has 8 corners, 12 edges and 6 faces, as in the most usual kind of dice.Source, pinned revision

  4. A quadrilateral with two pairs of parallel sides 400

    A parallelogramChecked against: In Euclidean geometry, a parallelogram is a chiral simple (non-self-intersecting) quadrilateral with two pairs of parallel sides.Source, pinned revision

  5. A line segment from the center of a circle to its edge 500

    A radiusChecked against: A radius is a line segment connecting a point on the circle and the center of the circle.Source, pinned revision

Measurement

  1. The number of centimeters in one meter 100

    100Checked against: Equivalently, there are 100 centimetres in 1 metre.Source, pinned revision

  2. The number of minutes in two hours 200

    120Self-contained calculation; no external factual claim.

  3. The area of a 6 cm by 4 cm rectangle 300

    24 square centimetersSelf-contained calculation or judgment; no external factual claim.

  4. The most suitable metric unit for the mass of an apple 400

    GramsSelf-contained calculation or judgment; no external factual claim.

  5. The volume of a 3 by 2 by 4 rectangular prism 500

    24 cubic unitsSelf-contained calculation or judgment; no external factual claim.

Final round

  1. This number is both a factor of 24 and a multiple of 6, and it lies between 10 and 20.

    12Self-contained calculation from the quantities in the clue; no external factual claim.

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