Question

David made an error when determining the product of (–2.5)(–8.3).

Step 1: (–2.5)(–8.3) = (–8.3)(–2.5)
Step 2: = (–8.3)(–2) + (–8.3)(–0.5)
Step 3: = (–16.6) + (–4.15)
Step 4: = –20.75

In which step did David make his first error?

Answer 1

\(\large -1\times -1=+1\)

Answer 2

step 3 ^ for that reason

Answer 3

-8.3 = -1 * 8.3
-2 = -1*2
-8.3 * -2 = -1*-1 *8.3*2 = 1*16.6 = 16.6