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Maaf Kalo Salah, Janjimu Tolong ditepati

1) 1,8 km - 1.600 m + 400 dm = 1.800 m - 1.600 m + 40 m
                                                    = 200 m + 40 m
                                                    = 240 m
                                                    = 24 dam ( A )

2) 8 lusin + 4 buah + 2  1/2 gros = 8 ( 12 ) + 4 + 5/2 ( 144 )
                                                        = 96 + 4 + 360
                                                        = 100 + 360
                                                        = 460 ( D )