Paige Posted May 3, 2013 Share Posted May 3, 2013 Can someone please check the answer (yourself) to MM Grade 5B pg 107 problem #5D? I am not getting the same answer as the answer key and I'm wondering if I'm wrong and if so, why. (It's probably something basic if I'm wrong). Parts A-C are correct and we use those for part D. The problem- D. Use the calculations above to figure out what would be the total number of erasers that could fit into the box. A- eraser is 1/8in thick, how many can be stacked in a 4in tall box? Answer- 32 B- eraser is 1 3/8in long. The box is 6in long. How many fit lengthwise? Answer- 4 C- eraser is 13/16in wide. The box is 5in wide. How many fit widthwise? Answer- 6 Thank you. Quote Link to comment Share on other sites More sharing options...
magnificat Posted May 3, 2013 Share Posted May 3, 2013 I would calculate it 32 x 6 x 4 as it is a volume problem. My answer is 768. Quote Link to comment Share on other sites More sharing options...
Paige Posted May 3, 2013 Author Share Posted May 3, 2013 I would calculate it 32 x 6 x 4 as it is a volume problem. My answer is 768. Thank you! I realize my problem now. I wrote it out correctly here, but wrote it incorrectly on my scratch paper! My DS had incorrectly used 5 instead of 4 the first time. He corrected it, but left the 5 sitting there on the page. I used the 5 he had written first instead of the correction which was to the side. I feel stupid! :blushing: I knew it was LxWxH, and I knew that DS had fixed all of his answers, and I kept coming up with 960, and I knew my multiplication was correct. It took seeing it here for me to realize I had copied the problem wrong. Quote Link to comment Share on other sites More sharing options...
kiwik Posted May 4, 2013 Share Posted May 4, 2013 Are all their length problems in imperial units? I hate the constant converting that involves in a metric coulntry. Quote Link to comment Share on other sites More sharing options...
fraidycat Posted May 4, 2013 Share Posted May 4, 2013 Are all their length problems in imperial units? I hate the constant converting that involves in a metric coulntry. MM teaches both imperial and metric. Is that what you were asking? Quote Link to comment Share on other sites More sharing options...
kiwik Posted May 4, 2013 Share Posted May 4, 2013 Oh good. We can just skip the imperial bits unless we want the extra challenge. Quote Link to comment Share on other sites More sharing options...
TXBeth Posted May 4, 2013 Share Posted May 4, 2013 I would calculate it 32 x 6 x 4 as it is a volume problem. My answer is 768. But then you have to add the extra 48 that can fit sideways in the extra 1/2 inch of length. S it should be 816 altogether. Quote Link to comment Share on other sites More sharing options...
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