Thursday, October 14, 2010 at 8:29pm.
A math book is .78 centimeters thick. What is the width of 21 math books on a shelf?
That's an awfully slim math book. Are you sure it's only 0.78 cm thick?
0.78 * 21 = 16.38 cm
This is so easy and I'm a fourth grader.
All you have to do TJ is to multiply 78 by 21
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