On The Double

Double these numbers and write down the answers in the back of your books:

379141923
323947636568
82169223260264308
1750.256.260.3040.0030.00008-9

Dog on the double!

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Keywords: Starter | Arithmetic

  • Bernadette Summers,
  • Friday, January 26, 2007
  • "I like this and so did my pupils, extremely good idea."
  • The Best Maths Class Ever 7cd/M2, King Alfred's College, Oxfordshire
  • Thursday, May 07, 2009
  • "Too simple. Just 24 multiplication questions that everyone could do upsidedown... No offence intended cos we love your website really."
  • Murran, Oxfordshire
  • Saturday, May 09, 2009
  • "Not the best starter ever!
    Too simple!"

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This starter has scored a mean of 3.1 out of 5 based on 28 votes.

 

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Answers

 

3 x 2 =
6
7 x 2 =
14
9 x 2 =
18
14 x 2 =
28
19 x 2 =
38
23 x 2 =
46
32 x 2 =
64
39 x 2 =
78
47 x 2 =
94
63 x 2 =
126
65 x 2 =
130
68 x 2 =
136
82 x 2 =
164
169 x 2 =
338
223 x 2 =
446
260 x 2 =
520
264 x 2 =
528
308 x 2 =
616
1750.2 x 2 =
3500.4
56.26 x 2 =
112.52
0.304 x 2 =
0.608
0.003 x 2 =
0.006
0.00008 x 2 =
0.00016
-9 x 2 =
-18

 

Note to teacher: Doing this activity once with a class helps students develop strategies. It is only when they do this activity a second time that they will have the opportunity to practise those strategies. That is when the learning is consolidated. Click the button above to regenerate another version of this starter from random numbers.

 


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