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1 lusin = 12 buah (12 x 2)
Maka,
= (4 x 144) : (12 x 2)
= 576 : 24 = b) 24 kardus.
54. 2(9,87 - 5,23 + 3,02)
= 2 x (4,64 + 3,02)
= 2 x 7,66 = b) 15,32
Semoga membantu kakak :)