Question

Jack broke apart 5 times 216 as 5 times 200 plus 5 times 16 to times mentally with stragety did jack use

Answer 1

he expanded 216 into 200 + 16 and used 5 to multiply both 200 and 16 and then added them. This is expansion.
$5*216=5*(200+16)=(5*200)+(5*16)$