Standard Form & Ordinary Numbers – Converting – Treasure Trail Individual students (or pairs) can start the trail at any question poster. Once they have calculated the answer they should then find the poster that has that answer at the top. Students go from one question to the next until they have completed the full circular trail. Students should record the letters of the questions they have completed. (Clear plastic wallets around your classroom make it quick and easy to display posters.)

Printing To print full page posters - Click: File > Print. Enter ‘4-20’ in ‘Slides:’ or Click on the section title to highlight all posters. To print half-size posters - File > Print. Select ‘Full Page Slides’, then ‘2 Slides’.

Standard Form

40200 g Convert this to an ordinary number. 4.1 × 104

41000 b Express this number in standard form. 420000

4.2 × 105 P Convert this to an ordinary number. 4.1 × 10−2

0.041 J Express this number in standard form. 0.0041

4.1 × 10−3 d Convert this to an ordinary number. 4.1 × 105

410000 m Express this number in standard form. 40100

4.01 × 104 h Convert this to an ordinary number. 4.1 × 10−5

0.000041 a Express this number in standard form. 0.411

4.11 × 10−1 l Express this number in standard form. 0.00401

4.01 × 10−3 f Convert this to an ordinary number. 4.02 × 10−5

0.0000402 Z Express this number in standard form. 4010

4.01 × 103 k Convert this to an ordinary number. 4.1 × 103

4100 i Convert this to an ordinary number. 4.02 × 10−1

0.402 o Express this number in standard form. 4002

4.002 × 103 e Express this number in standard form. 0.004

4 × 10−3 n Convert this to an ordinary number. 4.02 × 104

Teacher’s Answer Sheet G 41000 D 410000 L 4.01 × 10−3 I 0.402 B 4.2 × 105 M 4.01 × 104 F 0.0000402 O 4.002 × 103 P 0.041 H 0.000041 Z 4.01 × 103 E 4 × 10−3 J 4.1 × 10−3 A 4.11 × 10−1 K 4100 N 40200

answers g b P J d m h n a e l o i k Z f

Answer Sheet Sheet Answer

tom@goteachmaths.co.uk Questions? Comments? Suggestions? …or have you found a mistake!? Any feedback would be appreciated . Please feel free to email: tom@goteachmaths.co.uk