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Math Help - Some questions about dividing decimals?

  1. #1
    Junior Member Subliminalmessage's Avatar
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    Some questions about dividing decimals?

    I was dividing decimals just then on a maths website and I got 7 wrong, I'll put the link to the questions below.

    Math is Fun Worksheet

    The questions I got wrong were, 1,8,9,10,11,12,13. Now I looked back at these questions and I can see why they had the answers they had. For example, the first question.

    2.0/1.6, I got an answer of 1.25 however the answer is 0.8, looking back at the question it is obvious to realize that they just asked how many times does 2 go into 16. However I thought the 2.0 would become Twenty along with the 1.6 becoming Sixteen? Why doesn't it, why does it remain as a 2.0?

    Also I thought the sum had to be 2.0/1.6 because 2.0 is the bigger number but the way they answered it, did they not make it 1.6/2.0? Why is this?

    Thank you if you read through this, I hope you can help me out.
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  2. #2
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    Re: Some questions about dividing decimals?

    2.0 Doesn't remain 2.0. You have the right idea. 2.0 has to be converted into a whole number, which requires moving the decimal 1 spot to the right. You have to do the same to 1.6 as well. 20 doesn't go into 16 so that is 0. In order to get a answer another 0 has to be attached to the 16, so it would become 160/20 which is 8 times. Move the decimal straight up and the answer is 0.8.

    I'm not a math teacher or anything so I don't know how to explain it with proper terms. Sorry.
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  3. #3
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    Re: Some questions about dividing decimals?

    Quote Originally Posted by Subliminalmessage View Post
    Also I thought the sum had to be 2.0/1.6 because 2.0 is the bigger number but the way they answered it, did they not make it 1.6/2.0? Why is this?
    Who said that the dividend must be larger than the divisor?
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  4. #4
    Junior Member Subliminalmessage's Avatar
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    Re: Some questions about dividing decimals?

    Quote Originally Posted by TotteryManx View Post
    2.0 Doesn't remain 2.0. You have the right idea. 2.0 has to be converted into a whole number, which requires moving the decimal 1 spot to the right. You have to do the same to 1.6 as well. 20 doesn't go into 16 so that is 0. In order to get a answer another 0 has to be attached to the 16, so it would become 160/20 which is 8 times. Move the decimal straight up and the answer is 0.8.

    I'm not a math teacher or anything so I don't know how to explain it with proper terms. Sorry.
    Thanks a lot, I understand now.
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