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2cm*3cm=6cm²
2400:6=400 lembar.
7) 3DD1 dapat dibagi 9
3DD1=3*3*3*1=27(27 dapat dibagi 9)
jadi, D= 3
8)1 kg= 10 ons
100 kg= 10*100=1.000 ons
1.000 : 1,25 = 800 kotak
800*20.500= Rp16.400.000,00