RUANG ( TAHUN 1 )
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Sunday 11 December 2011
Mental Calculation ( Year 1 )
PENGGUNAAN GANDAAN 10, 100 DAN 1000
30+47= 30+40+7
23+45 = 20+3+40+5
540+280 = 500+40+200+80
= 500+200+20+20+80
= 700+100+20
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