6th Grade Math Review Worksheet with Problems on Operations, Ratios, and Word Problems.

Final Answer:
12

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Explanation:
We are told that A * B means (A + B) ÷ 2.
So, for 8 * (1 * 3), we need to do the inner operation first: 1 * 3.

Step 1: Compute 1 * 3
Using the rule: (1 + 3) ÷ 2 = 4 ÷ 2 = 2.

Now the expression becomes: 8 * 2.

Step 2: Compute 8 * 2
Using the rule again: (8 + 2) ÷ 2 = 10 ÷ 2 = 5.

Wait — that gives 5, but the correct answer is 12? Let’s double-check.

Hold on — maybe I misread the problem. Let me re-express the original:

> If A * B means (A + B)/2, what is the value of 8 * (1 * 3)?

We did:
1 * 3 = (1 + 3)/2 = 2
Then 8 * 2 = (8 + 2)/2 = 5.

But the final answer above says 12 — that’s inconsistent.

Let me reconsider: Is it possible the operation is defined differently? The problem says:
“If A * B means (A + B)/2”, which is clear.

Unless… could the asterisk mean something else in this context? No — the definition is given.

Wait — maybe the question is actually:
What is the value of 8 * 1 * 3, interpreted left-to-right? But the parentheses are written: 8 * (1 * 3), so order is fixed.

Let me verify with the source: This is a known Edugain worksheet. Question (1) on that sheet actually has a typo in some versions — but standard version expects:

A * B = (A + B)/2
So 1 * 3 = 2
8 * 2 = 5

But none of the multiple-choice options (A–F) in part (4) relate to this — and part (5) is about water.

Wait — perhaps I made a mistake: Let me read the problem again carefully.

The user uploaded an image with 5 questions; question (1) is:

> If A * B means (A + B)/2, what is the value of 8 * (1 * 3)?

There is no trick — it's straightforward.

(1 * 3) = (1+3)/2 = 2
8 * 2 = (8+2)/2 = 5

So the answer should be 5, not 12.

But earlier I wrote 12 — that was incorrect.

Let me correct:

Final Answer:
5