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1 buku = 18.000 / 12
1 buku = Rp1.500
3 buku = 1.500 x 3
= 4.500
kembalian = 5000 - 4500 = 500 (a)
10. 6 kue = 18 ons
1 kue = 18/6 = 3 ons
9 kue = 3 ons x 9 = 27 ons (d)
11. 5 kue = 1/2
1 kue = 1/10 kg
2 kg = ... kue
= 20 kue (b)
12. 55 hari = 1.237.500
1 hari = 22.500
3 hari = 67.500 (a)
13. 8 pekerja = 75 hari
x pekerja = 50 hari
x = 8 x 75 / 50
x = 12 (b)
14. 6 hr = 20 pkrj
3 hr = x pekerja
x = 6 x 20 /3
x = 40
Tambahan = 40 - 20 = 20 (a)
15. 12 org = 15 hr
x org = 9 hr
x = 12 x 15 / 9 = 20
Tambahan = 20 - 12 = 8 (a)