Dr Leong mentioned about how to use calculator in Developing Mental Computation in Maths
For My task: Explain how to use Multiplication in Doubling Number
Doubling number is using calculator in constants multiplication. Example 2 x 3 = = = until display passed 500.
Answers:
Use Writing on Whiteboard:
2 x 3 = 6
6x 3 = 18
18 x 3 = 54
54 x 3 = 162
162 x 3 = 486
**Multiplication of 3 is Doubling Number
Using Calculator:
Step 1: Press 2
Step 2: Pres 3
Step 3: Press"="
Answer will 6
**Press "=" continue the doubling number of 3
Useful Website:
http://www.phyllobl.net/index.php?option=com_content&view=article&id=450&Itemid=273
http://eduplace.com/math/mw/models/overview/3_9_2.html
http://pbskids.org/cyberchase/games/calculator/
http://www.woodlands-junior.kent.sch.uk/maths/timestable/tricks.html
Example of Repeated additional of Multiplication as shown below:
Repeated Addition as Multiplication
38281437 Repeated Addition as Multiplication
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