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  • - [Instructor] What we want to do in this video

  • is figure out what two divided by 0.4 is,

  • or two divided by 4/10.

  • So why don't you pause this video

  • and try to figure out what it is.

  • And as a little bit of a hint,

  • think about two on the number line

  • and think about how many jumps of 4/10

  • do you have to make starting at zero to get to two,

  • to figure out what two divided by 4/10 is.

  • All right, now let's do it together.

  • And as I mentioned in my hint,

  • let's just think about how many jumps

  • of 4/10 we have to make to go from zero to two.

  • And on this number line, each of these, this is a 10th

  • right over here because we can see there's 10 equal spaces

  • between zero and one.

  • So let's take some jumps of 4/10.

  • So if we start at zero, we can make,

  • let's see there's 1/10, 2/10, 3/10, 4/10.

  • That's one jump.

  • I'll number that.

  • And then we can make our next jump of one, two, three, 4/10.

  • Guess that's right over there.

  • That's two jumps.

  • Then our next jump will take us right over there.

  • So once again I'm just making equal jumps of 4/10.

  • Then my next jump

  • will take us one, two, three, 4/10 further.

  • So that gets us right over there.

  • We've taken four jumps.

  • And then it looks like our fifth jump gets us there.

  • One, two, three, 4/10.

  • Yup.

  • Our fifth jump gets us exactly to two.

  • So we've taken five jumps of 4/10 to go from zero to two

  • or another way to think about it is

  • if you were to divide two into equal chunks of 4/10,

  • you could divide into five equal chunks of 4/10.

  • Or you could make five equal jumps

  • to go from five equal jumps of 4/10

  • to go from zero to two.

- [Instructor] What we want to do in this video

字幕と単語

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A1 初級

整数線上の小数で整数を割る (Dividing a whole number by a decimal on a number line)

  • 100 3
    林宜悉 に公開 2021 年 01 月 14 日
動画の中の単語