Question

$(6 \ ? \ 3) + 4 - (2 - 1) = 5$ 。要使这个等式成立， $6$ 和 $3$ 之间的问号应替换为

$(6 \ ? \ 3) + 4 - (2 - 1) = 5.$ To make this statement true, the question mark between the $6$ and the $3$ should be replaced by

$\div$

$\times$

$+$

$-$

以上都不是

None of these

先化简不含问号的部分

Simplify the part without the question mark first

找出能使 $6\ ?\ 3=2$ 的运算

Find the operation that makes $6\ ?\ 3=2$

我们有 $4 - (2 - 1) = 4 - 1 = 3\text{。}$

因此 $(6 \ ? \ 3) + 3 = 5$ $6 \ ? \ 3 = 2\text{。}$

唯一可行的选择是 $\div$ 。

所以正确答案是 A。

We have that $4 - (2 - 1) = 4 - 1 = 3.$

Then $(6 \ ? \ 3) + 3 = 5$ $6 \ ? \ 3 = 2.$

The only choice that works is $\div.$

Thus, A is the correct answer.