Answer
$+$ : 298
$-$ : 298
$\times$ : 0
$\div$ : undefined
Work Step by Step
Substitute the given values and solve.
$a+b=298+0=298$
$a-b=298-0=298$
$a\times b=298\times0=0$
$a\div b=298\div0$ : division by 0 is undefined
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