问题


There is a single choice question about elementary mathematics. Answer the question by replying A, B, C or D.
Question: Use mental math to find the sum of 11.7 + 3.4 + 6.3.
A. 20.3
B. 20.4
C. 21.4
D. 22.4
Answer:

答案

模型 模型答案 正确答案
金声玉亮2.0

C. 21.4
C
deepseekr1

The sum of 11.7 + 3.4 + 6.3 can be simplified by grouping numbers that add to whole numbers. Adding 11.7 and 6.3 first gives 18.0. Then adding 3.4 results in 21.4. Step-by-step addition confirms this: 11.7 + 3.4 = 15.1, then 15.1 + 6.3 = 21.4.

Answer: C
C
gpto1 C C
GPT-4o A. 20.3 C
llama3.1-70B-Instruct

B
C
llama3.1-405B-Instruct

C
C
DeepSeek-Coder-V2 C. 21.4 C
Qwen2-72B-Instruct C. 21.4 C
baichuan4 B. 20.4 C
doubao B

11.7 + 3.4 = 15.1, 15.1 + 6.3 = 21.4.
C
minimax To find the sum of 11.7 + 3.4 + 6.3 using mental math, you can add the numbers in parts:

First, add the whole numbers: 11 + 3 + 6 = 20
Then, add the decimal parts: 0.7 + 0.4 + 0.3 = 1.4

Now, combine the whole number sum with the decimal sum: 20 + 1.4 = 21.4

So the correct answer is:

C. 21.4
C
kimi A. 20.3 C
wenxinyiyan C C
zhipu To find the sum of 11.7 + 3.4 + 6.3 using mental math, let's break it down step by step:

First, add 11.7 and 3.4:
11.7 + 3.4 = 15.1

Next, add the result to 6.3:
15.1 + 6.3 = 21.4

So, the sum is 21.4.

Answer: C
C
gpto1 C C
deepseekv3 To find the sum of \(11.7 + 3.4 + 6.3\) using mental math, we can group the numbers to simplify the calculation:

1. First, add \(11.7\) and \(6.3\):
\(11.7 + 6.3 = 18.0\).

2. Next, add \(3.4\) to the result:
\(18.0 + 3.4 = 21.4\).

Thus, the correct answer is **C. 21.4**.
C