Posted by Angelina on Wednesday, April 23, 2008 at 6:39pm.
Estimate. Choose a rounding digit that gives one or two nonzero digits.
18 x 61
a) 1200
b) 120
c) 2400
d) 12

Math  bobpursley, Wednesday, April 23, 2008 at 7:14pm
20 x 60 is an estimated guess.