the answer is 90
$${\mathtt{62}}{\mathtt{\,\times\,}}{\mathtt{88}} = {\mathtt{5\,456}}$$
Yes use a Protracter.
0.5=5%
5%>4%
0.5 is bigger
9 square root (2) =
9+10=19, unless you want to be silly it's 21
This is everywhere
$${\mathtt{4\,010\,392\,426}}{\mathtt{\,-\,}}{\mathtt{314\,424\,837}} = {\mathtt{3\,695\,967\,589}}$$
Before BC...Hehe
it is 7/20