Question 3 (a)
Add without using number line: 11 + (–7)
11 + (–7) = 11 – 7 = 4
Question 3 (b)
Add without using number line: (–13) + (+18)
Question 3 (f)
Add without using number line: (–217) + (–100)
Question 3 (c)
Add without using number line: (–10) + (+19)
Add without using number line: \((–380) + (–270)\)