[tex](1 \frac{3}{2} + 1 \frac{2}{3} ) \: - 2 \frac{1}{7 } \times \frac{21}{9 } \: [/tex] hasil dan cara dong

(1 3/2 + 1 2/3) - 2 1/7 × 21/9
= (5/2 + 5/3) - 15/7 × 21/9
= (15/6 + 10/6) - 15/7 × 21/9
= 25/6 - 15/7 × 21/9
= 25/6 - 315/63
= 25/6 - 5
= 25/6 - 30/6
= - 5/6

Semoga bisa membantu...