5th grade math (word problems)

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I didn't see an answer from yesterday, so resending. Also, is there a website to explain how to solve word problems - like key phrases to look for (ex: 'in all' - add; 'what's left' - subtraction)?

Here's question from yesterday:
sorry,but I don't understand word problems - like what formula/expression to use. Here's the 1st problem: Rob practiced 3/5 of his music in 25minutes. About how long does it take to practice all of his music?

I know that Rob has 2/5 left of music to practice. So, do I multiply 2/5 by 25minutes?

Here's the 2nd problem: Jared vowed to walk 100miles a month. If he can walk 1/2mile in 20minutes, how many minutes will it take him to walk 100miles?

In this case, do i multiply 100 by 1/2, then multiply by 20minutes?

  • 5th grade math (word problems) -

    1: 41.66 minutes
    (25*5)/3
    2.: 4000 minutes
    (100*20)/(0.5)

  • 5th grade math (word problems) -

    Could you explain why you divided 25 by 3/5?

  • 5th grade math (word problems) -

    For the first question divide 3 in two 25 your answer is the equation subtracted from 25

    2nd question=200×20=your answer

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