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1. ⅜ = 0,375

2. 6/14 + 0,8 + 22,5%
= 6/14 + 8/10 + 225/10
= 60/140 + 112/1740 + 3150/140
= 3322/140
= 1661/70

3. 6/14 × 7/18 ÷ 1/8
= 6/14 × 7/18 × 8
= 4/3

4. Buku cerita = 7/12 × 144 = 84 buah

5. Jarak sebenarnya = Jarak pada peta ÷ skala
Js = 15 ÷ 1 : 500.000
Js = 15 × 500.000
Js = 7.500.000 cm
Js = 75 km

6. <DAB = [360° – (2 × 40°)] ÷ 2
<DAB = 280° ÷ 2
<DAB = 140°

7. Banyak sudut = 0
Banyak rusuk = 2 buah

8. Jaring-jaring kerucut

9. Banyak sudut = 6 buah

10. Garis J

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