=3D=3D>Lack of comprehension of order of operations is EXTREMELY =
=3D=3D>common,as my diagnostic test has shown.
=3D=3D>Try on your students: 2*2^n + 3*2^n
I did. They blew it away on the exam before Christmas.
Actually it was cube rt(81) + 3 x cube rt(81) =
=3D=3D>A question on my diagnostic test asks the student to make a reason=
able
=3D=3D>estimate of log (base 10) of 500. Any answer between 2 and 3 is
=3D=3D>accepted.
OK it's on the calculus and precalculus final exams. =
I'll let you know in 10 days.
Oops! Calculators are allowed. How can I make this undoable =
via calculator? (They will convert any other base to =
natural logs, so that won't work.) =
Oh, I should mention, my students are Russian. They are good, =