Question

use the number line to subtract.
2 - 9
(a) draw two arrows to show 2 - 9.
drag to show the first number.
(b) 2 - 9 = \square

Explanation:

Step1: Locate starting number on line

Start at the number $2$ on the number line.

Step2: Split subtraction into two parts

Break $9$ into $2 + 7$. First, move left $2$ units from $2$ to reach $0$:
$2 - 2 = 0$

Step3: Complete the remaining subtraction

Then move left $7$ units from $0$ to reach $-7$:
$0 - 7 = -7$

Answer:

(a) (Arrow 1: From 2 left to 0; Arrow 2: From 0 left to -7)
(b) $-7$