3 jam - 90 menit=... jam

Halo Winda S, kakak bantu jawab ya. Jawaban : 1(1/2) jam. Ingat kembali : • Konversi satuan waktu. 1 menit = 1/60 jam • Aturan pengurangan pecahan yang penyebutnya berbeda. a/b – c/d = (a×d)/(b×d) – (c×b)/(d×b) • Aturan pengurangan pecahan yang penyebutnya sama. a/b – c/b = (a – c)/b Sehingga, 3 jam - 90 menit = 3 jam – (90×1/60 jam) = 3 jam – 9/6 jam = (3–9/6) jam = (3–(9:3)/(6:3)) jam = (3–3/2) jam = (3/1–3/2) jam = ((3×2)/(1×2)–(3×1)/(2×1)) jam = (6/2–3/2) jam = (6–3)/2 jam = 3/2 jam = 1(1/2) jam Jadi, 3 jam - 90 menit = 1(1/2) jam.