Posted by Jaycee on Tuesday, January 3, 2012 at 6:21pm.
There are 21 boxes of crackers in 1 case. Each box contains 24 crackers. What is the best estimate for the number of crackers in 7 cases?
A. 3,100
B. 3,500
C. 3,800
D. 4,000
Do I do 24x21? If I'm suppose to do that I don't know what I'm suppose to do next

Math  Ms. Sue, Tuesday, January 3, 2012 at 6:24pm
You're partly right. Now you need to multiply by 7.
Since you're supposed to estimate, multiply 20 * 25 * 7

Math  Jaycee, Tuesday, January 3, 2012 at 6:28pm
Instead of 24x21 I do 20x25?

Math  Ms. Sue, Tuesday, January 3, 2012 at 6:30pm
Yes, multiply 20 * 25 * 7

Math  Jaycee, Tuesday, January 3, 2012 at 6:33pm
It's B,right?

Math  Ms. Sue, Tuesday, January 3, 2012 at 6:35pm
Right!
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