An opamp may be a good way to do this. You connect the signal to the
input and connect the output to a divider made of two equal resistors, say 10k ohms. the other end of the divider goes to ground and the junction of the two resistors connects to the - input. The opamp will need a supply of at least 0 to 10 volts, if it is a rail to rail type, but at least 0 to 13 volts if it is a single supply type (like the Quad LM324) or at least -3 to 13 if it is a general purpose type.
To check the configuration, verify that the two inputs at at similar voltages at the ends of the signal range. At zero volts in and 0 volts out, there is zero volts on each input. At 5 volts signal and
10 volts out, there is 5 volts on each input b(the signal on one, and the output divided by 2 on the other).
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