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2. 2 1/2 + 1 1/3 - 1 3/4 = 5/2+4/3-7/4 = 30/12+16/12-21/12 = 25/12 = 2 1/12
3. 5 1/2× 3 1/2 : 2 3/4= 11/2 × 7/2 : 11/4 = 11/2 × 7/2 × 4/11 = 308/44 = 7
4. 18/24 = 3/4
5. 16 kg + 3 dag + 5 hg=...gram
16000 + 0,3g + 0,05
16000,35gram
6. 48 jam - 600 menit =.... menit
(48jam×60mnt)-600mnt
2880-600 = 2280
7. 28.750 × 3.432 = 98.670.000
8. Lp = 6s² = 6×15²= 6×225=1350
9. Skala = Jrak pda peta ÷ jrak sbenarnya = 16cm ÷ 48km = 16÷4800000= 1÷300000