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
Ggg has akak
There are a few numbers that do not need signs. You do not have to sign when timing something.
rules of operation sign of numbers
2×+4×-5 An expression does not have an equal sign but can be solved has numbers, variables, and at least one operation
If symbols do not have an equals then it is 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
This is a mathematical "expression".
An expression does not contain an equality sign.
change the sign and do the opposite operation.