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6/20/2013 7:11:39 AM
8
Basic Math WTF?
I got a basic math book from the library to sharpen my math skillZ and I noticed I keep getting one problem wrong. Estimate using compatible numbers division 321 ÷ 19 . Now me and someone else keep getting the wrong answer but our answer is the same so I wanted to see what some other peeps would get on this. Is it us or the book? I'll tell you the answer and what we get after I get some replies. It's eating at me something this basic is causing me trouble.
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320/20 is a close approximation to 321/19. Answer is 16 if that's close? Actual answer is 16.8.
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Edited by Saturn: 6/20/2013 8:14:55 AMAnyway feel free to keep replying i'll answer it with what the book said tomorrow. But I think the book is just full of s***. Opps I meant to edit not post.
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2 Replies318 is the closest you'll get with multiples of 19. 19*10 = 190 19*20 = 380 which is too much. 19*15 = 190 + 19*5 = 190 + 95 = 285 19*16 = 285 + 19 = 299 19*17 = 299 + 19 - 318 Which leaves a remainer of 3. Not sure if that's the method the book wants you to use, but that's how I'd rationalize it.
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1 ReplyArithmetic is what calculators are for.
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1 ReplyWhenever it comes to math, 42.
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2 Repliesare you just asking us to solve for "x" ? x = 321/19
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Sixteen and seventeen nineteenths I believe. 16 + (17/19)
