1-5 Disertai dengan cara

2. 5/11 x 385 = 175, 6/11 x 385 = 210, jadi selesiihnya 35
3. 12 kg = 28800, 15 = ?
? = 15 x 28800/12
   = 36000
4. 7/2 x 1.500.000 = 5.250.000cm = 52,5km
5. 100 m = 10000 cm
skala = 4 : 10000 = 1 : 2500

no 1 ga keliatan