# Khan/khan-exercises

multiplication_1 finished, percentage_word_problems_1 frameworked, st…

`…ill needs hints and problem types 5-7`
1 parent 535441a commit 4fce3f6d769ddbe61311d7f5977159a6a4bbc7c5 swestwood committed May 20, 2011
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28 exercises/multiplication_1.html
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+ rand(12) + rand(12) +
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A x B = ?

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A * B
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TODO: Hints go here. (pretty circles)

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65 exercises/percentage_word_problems_1.html
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+ 1 + rand(149) + 2 + rand(98) + 1 + rand(99) + BANK_MORE + 5 + rand(2*BANK_MORE + 5) + 10 + rand(140) + 50 + rand(949) +
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+ What is A_SIMPLE% of B_SIMPLE? (round to nearest whole number) +

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round((A_SIMPLE*B_SIMPLE)/100)

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A_SIMPLE/100 * B_SIMPLE \approx round((A_SIMPLE*B_SIMPLE)/100)
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+ B_SIMPLE is A_SIMPLE% of what number (round to the hundredths place)? +

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round((B_SIMPLE* 100/A_SIMPLE * 100)/100)

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Let x be the number that B_SIMPLE is A_SIMPLE% of.

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A_SIMPLE/100 * x = B_SIMPLE

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x=B_SIMPLE/A_SIMPLE/100

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x \approxround((B_SIMPLE* 100/A_SIMPLE * 100))/100

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+ Jerry has BANK_MORE dollars in the bank today. Yesterday, he had BANK_FEWER dollars in the bank. By what percentage did Jerry's bank account increase over the past day? (enter your answer as a percentage rounded to the hundredths place. For example, if your answer is 95.678%, enter 95.68 for your answer)

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round(((BANK_FEWER - BANK_MORE)*10000/BANK_MORE))/100

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+ Jerry has BANK_FEWER dollars in the bank today. Yesterday, he had BANK_MORE dollars in the bank. By what percentage did Jerry's bank account decrease over the past day? (enter your answer as a percentage rounded to the hundredths place. For example, if your answer is 95.678%, enter 95.68 for your answer) +

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round(((BANK_FEWER - BANK_MORE)*10000/BANK_FEWER))/100

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