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=> 6 - 2 = 4
19. 4/5 = satuan terdekat adalah 5/5 atau 1
20. 20% ×20.000
= 20/100 × 20.000
= 4.000
21. Selisih = mangga ibu - mangga bibi
= 5 - 3 1/2
= 5 - 7/2
= 10/2 -7/2
= 3/2 = 1 1/2