Question 5 (a)
Find the sum: (–7) + (–9) + 4 + 16
(–7) + (–9) + 4 + 16 = –7 – 9 + 4 + 16 = –16 + 20 = 4
Question 7 (i) Without adding, find the sum:
1 +3 + 5+7 + 9