Penjelasan dengan langkah-langkah:

1) (-8 + 3) × (2 × 3)

= -5 × 6

= -30 (C)

2) 2² + 2^-1 - 2⁰ = 4 + ½ - 1 = 3½ (B)

3) 2√3 × 3√2 - √24 = 6√6 - 2√6 = 4√6 (A)

4) ⅓ + ¼ + ⅕ = ⁴⁷/60

Sisa = ¹³/60

¹³/60 × 300 = 65 m² (D)

5) T7 - T4 = 38 - 29

T3 = 9

T = 3

18 × 3 = 54 cm (C)

6) 4, 12, 24, 40, ...

a + (n - 1)b + ½(n² - 3n + 2)c

a = 4

b = 8

c = 4

U7 = 4 + (7 - 1)8 + ½(7² - 3(7) + 2)4

U7 = 52 + ½ × 120

U7 = 52 + 60

U7 = 112 (D)

7) 12 × 150 ÷ 100 = 18m

8 × 150 ÷ 100 = 12m

L = 18 × 12

L = 216m² (C)

8) 72 ÷ 40 × 30 = 96

Tambahan = 96 - 72 = 24 (B)

9) tabungan awal 3.000.000

tabjngan 10 bulan 3.150.000

3.150.000 - 3.000.000 = 150.000

¹⁵⁰⁰⁰⁰/3000000 = ⁵/100 = 5%

bunga 10 bulan = 5%

bunga 1 bulan = 5 ÷ 10 = 0,5%

1 tahun = 12 bulan

1 tahun = 5 + 0,5 + 0,5 = 6%

bunga pertahun = 6% (C)