Complete the Decimal Sequence: Finding Missing Terms in 1, 0.8, 0.6, ?, ?

Question

Complete the following sequence:

$1,0.8,0.6,?,\text{?}$

00:00 Complete the sequence

00:07 Subtract between the numbers to find the difference

00:39 This is the difference between terms

00:52 Let's verify the pattern holds, subtract between the following numbers

01:13 We see the difference is equal, therefore the pattern holds

01:26 Let's use this pattern and add the difference to find the next term

01:51 This is the next term, let's use the same method for the remaining terms:

02:27 And this is the solution to the question

To solve this problem, we'll look for a consistent pattern in the given sequence:

Step 1: Identify the difference between consecutive terms.
- From $1$ to $0.8$ , the difference is $0.2$ (i.e., $1 - 0.8 = 0.2$ ).
- From $0.8$ to $0.6$ , the difference is $0.2$ (i.e., $0.8 - 0.6 = 0.2$ ).
Step 2: Determine the next terms using this difference.
- The next term after $0.6$ will be $0.6 - 0.2 = 0.4$ .
- The term after that will be $0.4 - 0.2 = 0.2$ .

Therefore, the sequence $1, 0.8, 0.6, ?, ?$ continues as $0.4, 0.2$ .

The correct answer is $0.4, 0.2$ , which corresponds to choice 4.

$0.4,0.2$