To estimate the value of \( 6 \times 2 - \sqrt{} \), we first need to clarify the expression a bit. It appears there might be an incomplete square root due to the symbol "√" being present without a number.
Assuming the expression is \( 6 \times 2 - \sqrt{0} \), as a minimal interpretation, the calculation would be:
\[ 6 \times 2 - \sqrt{0} = 12 - 0 = 12 \]
If you meant something different by the expression containing the square root, please provide clarification.
However, assuming "6×2" refers to a multiplication of 6 and 2, the result will remain positive, thus the estimates you've provided (7.1, 8.4, 6.4, and 9.8) would be less likely the answer unless a calculation error is accounted for.
If you needed to calculate \( 6 \times 2 - \sqrt{1} \):
\[ 6 \times 2 - \sqrt{1} = 12 - 1 = 11 \]
This leads to estimates being in the range of what you've provided but again, remains unclear unless more specifics are shared.
In essence, it’s vital to clarify the square root aspect or numbers involved for a precise estimation. But given those choices primarily considered to compute from base \( 6 \times 2 \) mathematically, the answer lands closer to 12. Hence no presented options fit for \( 6 \times 2 -\sqrt{}\) under standard operations.
If provided with clearer expressions, can point the estimate better aligning to answers offered!