Grade 9Mathpractice16 questions

Standard form

Grade 9: write large numbers in standard form, write small numbers in standard form, convert back to ordinary numbers, compare numbers in standard form, multiply in standard form.

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Free to play. Teams answer on one screen; your phone is the remote. No student devices.

Questions

  1. Which is 45 000 written in standard form?

    • 0.45 × 10⁵
    • 4.5 × 10³
    • 4.5 × 10⁴
    • 45 × 10³
    Show answer4.5 × 10⁴

  2. Write 6 300 000 in standard form.

    • 6.3 × 10⁵
    • 6.3 × 10⁶
    • 6.3 × 10⁷
    • 63 × 10⁵
    Show answer6.3 × 10⁶

  3. The number 120 000 000 in standard form is 1.2 × 10⁸. (True or false?)

    Show answerTrue

  4. Which is 0.0004 written in standard form?

    • 0.4 × 10⁻³
    • 4 × 10⁴
    • 4 × 10⁻³
    • 4 × 10⁻⁴
    Show answer4 × 10⁻⁴

  5. Write 0.00072 in standard form.

    • 7.2 × 10⁻³
    • 7.2 × 10⁻⁴
    • 7.2 × 10⁻⁵
    • 72 × 10⁻⁵
    Show answer7.2 × 10⁻⁴

  6. Write 0.05 in standard form. (Answer out loud)

    Show answer5 × 10⁻²

  7. Which ordinary number is equal to 3.8 × 10⁵?

    • 3 800
    • 3 800 000
    • 38 000
    • 380 000
    Show answer380 000

  8. Which ordinary number is equal to 9.1 × 10⁻³?

    • 0.00091
    • 0.0091
    • 0.091
    • 9100
    Show answer0.0091

  9. The number 25 × 10³ is written in standard form. (True or false?)

    Show answerFalse

  10. Which number is the largest?

    • 2 × 10⁷
    • 8.9 × 10⁵
    • 9 × 10⁶
    • 9.9 × 10⁶
    Show answer2 × 10⁷

  11. Which number is the smallest?

    • 1 × 10⁻³
    • 2 × 10⁻⁴
    • 5 × 10⁻³
    • 8 × 10⁻⁴
    Show answer2 × 10⁻⁴

  12. Work out (2 × 10³) × (3 × 10⁴). Give the answer in standard form.

    • 5 × 10⁷
    • 6 × 10¹²
    • 6 × 10⁶
    • 6 × 10⁷
    Show answer6 × 10⁷

  13. Work out (4 × 10⁵) × (5 × 10²) in standard form.

    • 2 × 10⁷
    • 2 × 10⁸
    • 2 × 10⁹
    • 9 × 10⁷
    Show answer2 × 10⁸

  14. (3 × 10⁻²) × (2 × 10⁻³) = 6 × 10⁻⁵. (True or false?)

    Show answerTrue

  15. Work out (1.5 × 10⁴) × (4 × 10³) in standard form. (Answer out loud)

    Show answer6 × 10⁷

  16. Work out (2 × 10⁵) × (3 × 10⁻²) in standard form. (Answer out loud)

    Show answer6 × 10³

Play it as a game

Mystery PictureEvery right answer removes a piece. Name the picture first for a big bonus.Tile GrabAnswer right to flip a tile. Points, stars, bombs and magnets that steal points.Dare BoardPick a tile first: 1 to 5 points, and the higher the tile, the harder the question. One tile is a Double dare!Prize ClimbAnswer right to climb ten prize steps, then bank your stars or climb on. Three lifelines help.

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