Question

Explain why 17 tens. and 1 hundred 7 tens have the same value

Answer 1

Because 1 hundred and 7 tens equal 170
and 17x10 equals 170

Answer 2

we know that

$1\ tens=10 \\1\ hundred=100$

so

1) the expression $17\ tens$ is equal in numbers to

$17\ tens=17*10=170$

2) the expression $1\ hundred\ 7\ tens$ is equal in numbers to

$1\ hundred\ 7\ tens=1*100+7*10=100+70=170$

therefore

$17\ tens$ and $1\ hundred\ 7\ tens$ have the same value