SASMO 2027 · Grades 2-3 · SET 004 · Self-study Question 10

Compute:

(a) A = 12 − 11 + 10 − 9 + 8 − 7 + 6 − 5 + 4 − 3 + 2 − 1.

(b) B = 1 − 2 + 3 − 4 + 5 − 6 + 7 − 8 + 9.

(c) C = (2 + 4 + 6 + ⋯ + 28 + 30) − (1 + 3 + 5 + 7 + ⋯ + 27 + 29).

Enter A; B; C, separated by semicolons.