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Math Help - 2 quick easy math questions

  1. #1
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    2 quick easy math questions

    3.8 devide 10 = 0.38 < this is the correct answer but I'm not sure how to to go about getting that answer.

    Next

    6 x 4/6 = 12/3 < again I'm not sure how to go about getting this answer.

    These are two questions I'm stuck with in my practice paper. They won't be in my exam but something on the same scale will be though.

    Great forum here btw, I'm glad I found it. I got till wednesday for my exam.

    Bren
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  2. #2
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    First one:

    When dividing by multiples of 10, you can easily figure out a solution without a calculator by simply moving the decimal left (depending on the number of zeros). For example:

    9.63 divide 100
    There are two zeros in 100 so you move the decimal two places to the left:
    = 0.0963

    Second one:

    Multiplying fractions is simpler than you think. To multiply fractions, simply multiply across. Think is 6 as being 6/1. Also, remember, fractions are just like dividing: 9/3 is the same as 9 divide 3.

    6/1 times 4/6.
    First, multiply 6 and 4 to get 24.
    Next, multiply 1 and 6 to get 6.

    Your answer is 12/3 (to get this, you "simplify" it. They're both even numbers and so, you divide them by 2 to make it simpler) but however, remembering that fractions mean division, you get 4 (12 divide 4).
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  3. #3
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    Smile

    Thanks

    First one:

    So if one of the questions might be 7.6 devide 10 then that should give me an answer of 0.76 or

    2.9 devide by 10 = 0.29
    8.8 devide by 10 = 0.88
    3.5 devide by 100 = 0.035

    right?

    does this only work if the first number has a decimal init like 3.8 What if its 38 devide by 10. Is it still the same method.

    I can't use a calculator for this test so I'm sure it will be pretty simple stuff.

    I'm still watching videos on youtube about fractions so I will get back to the second one when I learn a bit more.

    excellent
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  4. #4
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    Quote Originally Posted by Bren86 View Post
    Thanks

    First one:

    So if one of the questions might be 7.6 devide 10 then that should give me an answer of 0.76 or

    2.9 devide by 10 = 0.29
    8.8 devide by 10 = 0.88
    3.5 devide by 100 = 0.035

    right?

    does this only work if the first number has a decimal init like 3.8 What if its 38 devide by 10. Is it still the same method. Mr F says: 38 has the same value as 38.0

    I can't use a calculator for this test so I'm sure it will be pretty simple stuff.

    I'm still watching videos on youtube about fractions so I will get back to the second one when I learn a bit more.

    excellent
    ..
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