An expression does not contain an equality sign.
A mathematical expression has numbers and operation signs with no equal sign. Equations, on the other hand, do contain equal signs.
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An expression
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If there is an equal sign, it is called an equation; if there is a less-than, a less-than-or-equal, a greater-than, or a greater-than-or-equal sign, an inequality; if there is none of these, an expression.
An "expression", is part of a number sentence that combines numbers and operation signs but does not have an equal sign" Example: x/y , when x=10 and y=5 , the assumption of this expresssion is 10/5 or 2. Or: 2+3 , the assumption of this expression is 5 even though no equal sign is present. Lyle Larson 4th grade Southern California
There are a few numbers that do not need signs. You do not have to sign when timing something.
This is a mathematical "expression".
That is called an expression.
If symbols do not have an equals then it is an expression.
All zodiac signs have shown to be about equal in the number of gay people.
Rules of operators additon and multiplication (+) + (+) = + (+) + (-) OR (-)+(+)= sign of bigger number (-) + (-) = -(operation is addition but sign is -) (+) * (+) = + (-) * (-) = + (+) * (-) OR (-)*(+)= -