3＋3＋3＋3＝4＋4＋4＝12

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Worked solution

1. 计算等式左边连加算式的值

计算 $3 + 3 + 3 + 3$ ：
$3 + 3 + 3 + 3 = 12$

2. 计算等式中间连加算式的值

计算 $4 + 4 + 4$ ：
$4 + 4 + 4 = 12$

3. 判断等式是否成立并得出结论

因为 $3 + 3 + 3 + 3 = 12$ 且 $4 + 4 + 4 = 12$ ，所以等式 $3 + 3 + 3 + 3 = 4 + 4 + 4 = 12$ 成立。
因此，该说法正确，选择 A。

Answer

AI analysis — may contain mistakes.

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