问题


There is a single choice question about elementary mathematics. Answer the question by replying A, B, C or D.
Question: Mr. Lucci put together 5 bags of pens. He put 19 black pens and 12 red pens in each bag. Which expression shows the total number of pens Mr. Lucci put into bags?
A. (5 × 19) + 12
B. 5 × (19 + 12)
C. 5 + (19 × 12)
D. (5 + 19) × 12
Answer:

答案

模型 模型答案 正确答案
金声玉亮2.0

B. 5 × (19 + 12)
B
deepseekr1

To determine the total number of pens, first calculate the number of pens in one bag: \(19\) black \(+ 12\) red \(= 31\) pens. Since there are \(5\) bags, multiply the pens per bag by \(5\):
\[5 \times (19 + 12)\].

This matches **Option B**. Other options either misapply multiplication (e.g., A ignores multiplying \(12\) by \(5\), C and D incorrectly group operations).

Answer: **B**
B
gpto1 B B
GPT-4o B. 5 × (19 + 12) B
llama3.1-70B-Instruct

B
B
llama3.1-405B-Instruct

B. 5 × (19 + 12)
B
DeepSeek-Coder-V2 B. 5 × (19 + 12) B
Qwen2-72B-Instruct B. 5 × (19 + 12) B
baichuan4 B. 5 × (19 + 12) B
doubao B. 5 × (19 + 12)

Each bag contains 19 black pens + 12 red pens = 31 pens. There are 5 bags, so the total number of pens is 5 × 31 which is the same as 5 × (19 + 12).
B
minimax B. 5 × (19 + 12)

Explanation: Mr. Lucci put 19 black pens and 12 red pens in each bag, so the total number of pens in one bag is 19 + 12. Since he put together 5 bags, you multiply the total number of pens in one bag by the number of bags, which is 5 × (19 + 12).
B
kimi B. 5 × (19 + 12) B
wenxinyiyan B B
zhipu The correct answer is B.

Here's the reasoning:
- Mr. Lucci has 5 bags.
- Each bag contains 19 black pens and 12 red pens.
- The total number of pens in one bag is \( 19 + 12 \).
- Since there are 5 bags, the total number of pens is \( 5 \times (19 + 12) \).

So, the expression that shows the total number of pens is \( 5 \times (19 + 12) \).

Therefore, the answer is B.
B
gpto1 B B
deepseekv3 To find the total number of pens Mr. Lucci put into bags, we need to calculate the number of pens in each bag and then multiply by the number of bags.

1. Each bag contains **19 black pens + 12 red pens = 31 pens**.
2. There are **5 bags**, so the total number of pens is **5 × (19 + 12)**.

The correct expression is **B. 5 × (19 + 12)**.

Answer: B
B