Presentation on theme: "Following Directions Lesson"— Presentation transcript:
1Following Directions Lesson Mr. DavisAgriscienceElba High School
2Following Directions Lesson Take out a clean sheet of notebook paper and something to write with.Place it in front of you on your desk.
3Following Directions Lesson Fold your paper in half long ways “hot dog style”.
4Following Directions Lesson Open your paper up and place it holes to the top on your desk.Draw a line all the way down the crease on the paper.“DO NOT WRITE ON THE DESK!!”
5Following Directions Lesson Fold the paper in half the other way “hamburger style”.You can see my line because I used a Sharpie Marker and it bled through the paper.
6Following Directions Lesson Open the paper up with the holes to the top.Draw a line from the center of the paper to the margin closest to you.
7Following Directions Lesson Fold the paper like you had it last “hamburger style”.Then fold it over again in the same direction as you folded it last.
8Following Directions Lesson Open the paper up.Draw a line on each of the creases half way to the bottom margin.Then fold your paper back up like you last had it.
9Following Directions Lesson Fold the paper over one more time in the same direction as your last fold, making it even more slender.
10Following Directions Lesson Open the paper up.Draw lines on the four creases half as long as the last lines you drew, or ¼ of the way to the bottom margin.
11Following Directions Lesson Draw small lines on our paper in between each of the lines already on your paper and the left and right edges.Make the lines extend down and be half as long as the last lines drawn.
12Following Directions Lesson Next, draw lines on the left and right edges all the way down below the margin, half way between the margin and the bottom of the paper.And in case you haven’t already figured it out, we are making a ruler.
13Reading a RulerNow all you have to do is count the lines as you go from left to right.35179111315261014412816
14Reading A RulerBy counting you realize that you have 16 equal parts to an inch.Next you show each number as a fraction or portion of the total number 16.1/163/165/167/169/1611/1613/1615/162/166/1610/1614/164/1612/168/1616/16
15Reading A RulerNext, you must remember from math that a fraction should always be expressed in lowest possible terms.1/16 for example is in its lowest form, it cannot be reduced any farther.2/16 however, can be reduced.2 is the numerator (top number in a fraction)16 is the denominator (bottom number in a fraction)
16Reading A Ruler2/16 can be reduced by 2. This means that both 2 and 16 are divisible by 2.2 divided by 2 = 116 divided by 2 = 8Therefore our reduced fraction will be 1/8.
17Reading A Ruler Now lets take 3/16, will it reduce? I bet that someone said yes!Some people look at the three as the numerator and the six in the sixteen (denominator) and automatically think that this fraction will reduce. However, it will not reduce.3/16 is already in its lowest terms.
18Reading A RulerNext, lets look at 4/16. Yes it will reduce. There are two ways to reduce fractions like this one. If you’re a math wiz, you might say that 4 will go into 16. If you do, you are right. You can divide the numerator into the denominator. This is the quickest of the two ways, but you can divided both the numerator and the denominator by 2, twice. You have to be careful to get fractions like this one into lowest possible terms.
19Reading A Ruler The easiest way to deal with 4/16: 4 divided by 4 = 1 Your reduced fraction is ¼.
20Reading A Ruler The other way to deal with 4/16 is: 4 divided by 2 = 2 Your fraction is 2/8, but is it reduced to lowest possible terms? NO, you have to reduce again.2 divided by 2 = 18 divided by 2 = 4Your reduced fraction is 1/4
21Reading A RulerNow that you know how to reduce these fractions, you finish reducing the rest of the fractions on your ruler.
22Reading A RulerNow Check your fractions against these correct answers.1/163/165/167/169/1611/1613/1615/161/83/85/87/81/43/41/21
23Now that you know how to use a ruler, here are some short cuts for you. As you have noticed, the lines are different lengths on the ruler.As we go across one more time pay attention to the line length and the denominator associated with it.Reading A Ruler1/163/165/167/169/1611/1613/1615/161/83/85/87/81/43/41/21
24Reading A Ruler Did you notice a trend? The longest lines were of course whole numbers.1
25Reading A Ruler The second longest line is 1/2. The third longest line has a denominator of 4.1/43/41/2
26Reading A RulerThe fourth longest lines always have a denominator of 8.1/163/165/167/169/1611/1613/1615/161/83/85/87/8The shortest lines always have a denominator of 16.
27Reading A RulerNow let’s look at the whole ruler. Can you tell me what would be the correct measurement for the letter A.The answer is /16.You start at the whole number and you add the calculated fraction to the whole number to give the correct distance.A65
28Reading A Ruler What is the correct measurement for the letter A. The answer is /16.What is the correct measurement for the letter B.The answer is /8.What is the correct measurement for the letter C.The answer is /4.ABC1110
29Reading A RulerNow you know how to read a ruler and deal with the fractions involved.But these are measurements, and have to be expressed as measurements. Write the following notes on your paper.This standard ruler is to be expressed in inches or in. or “. Example: 1 ½”12 inches is equal to 1 foot or ft. or ‘. Example 4’ 1 ½”Three feet is equal to 1 yard or yd.15/16
30Reading A RulerSee if you can tell the measurements of the objects on the following screens for a quick quiz.On the back of your paper title it Measurement Quiz and number from 1 to 5.