Add mask for NA to _arith_method

Author: cooolheater

Diff for: pandas/core/array_algos/masked_reductions.py

@@ -12,7 +12,6 @@
 
 from pandas._libs import missing as libmissing
 
-from pandas.core.missing import isna
 from pandas.core.nanops import check_below_min_count
 
 if TYPE_CHECKING:
@@ -58,8 +57,6 @@ def _reductions(
         else:
             return func(values, axis=axis, **kwargs)
     else:
-        mask |= isna(values)
-
         if check_below_min_count(values.shape, mask, min_count) and (
             axis is None or values.ndim == 1
         ):

Diff for: pandas/core/arrays/masked.py

@@ -767,6 +767,8 @@ def _arith_method(self, other, op):
 
             with np.errstate(all="ignore"):
                 result = pd_op(self._data, other)
+                if op_name == "truediv":
+                    mask |= isna(result)
 
         if op_name == "pow":
             # 1 ** x is 1.