Is this number sentence true or false for every value of $m$m?
$m+1=1+m$m+1=1+m
True
False
Is this number sentence true or false for every value of $g$g?
$g\cdot3=3\cdot g$g·3=3·g
Is this number sentence true or false for every value of $n$n?
$-5+n=n-5$−5+n=n−5
Is this number sentence true or false for every positive value of $v$v?
$v\div3=3\div v$v÷3=3÷v