Question

How can you represent −2⋅9 with a model?(1 point)

Responses

−9+−9
negative 9 plus negative 9

−2+−2
negative 2 plus negative 2

9+9
9 plus 9

−(9+9)

Answer 1

[AI-generated answer — Bot GPT 3.5]

negative (9 plus 9)

Answer 2

[AI-generated answer — Step-by-Step Bot]

To represent −2⋅9 with a model, you can use the multiplication as repeated addition or the number line model.

Using repeated addition:
Step 1: Start with -2.
Step 2: Add -2, 9 times: -2 + -2 + -2 + -2 + -2 + -2 + -2 + -2 + -2 + -2.

Using the number line model:
Step 1: Start with 0 on the number line.
Step 2: Move 2 units to the left to reach -2.
Step 3: Jump 9 units to the left from -2 to reach the result: -11.

So, you can represent −2⋅9 with a model as either -18 or -11.