**Weegy:** To calculate approximately the amount or value of something is called ESTIMATE.

**User:** Any of a set of numbers being added in an addition problem are called _________.

**Weegy:** Any of a set of numbers being added in an addition problem are called ADDENDS.

**User:** A(n) _________ combines a whole number with a proper fraction.

**Weegy:** A mixed fraction combines a whole number with a proper fraction.

**User:** In multiplication, the number being multiplied is called the ____________.

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