20. Jumlah 20 suku pertama suatu deret aritmetika ialah 500. Jika suku pertama ialah 5 maka suku terakhir deret itu adalah A. 35 B. 39 C. 45 D. 48 E. 52

Combine. Be sure to simplify your answer whenever possible. \( \frac{11}{18}-\frac{1}{18} \) \( \frac{11}{18}-\frac{1}{18}=\square \) (Type a fraction. Simplify your answer.)

5. RESOLVA A OPERACAD : \( \frac{1}{3}+\frac{2}{5} \)

1. \( \begin{array}{l}54-(46+7) \\ 37-(24-8)\end{array} \)

\( \frac{12}{13}+\frac{1}{13}+\frac{10}{13}=\square \) (Type an integer or a fraction.)

11. Arnaldo tinha 100 reais e gastou \( \frac{3}{7} \) do que tinha. Com quantos reais ficou Arnaldo? a) 40 b) 50 c) 60 d) 70 e) 80