Alex needs 2&1/4 cups of flour ,he has 2&3/10 cups Draw a number line that shows both fractions.
http://www.mathsisfun.com/numbers/fraction-number-line.html
To draw a number line that shows both fractions, we can start by finding the common denominator for 1/4 and 3/10. The least common multiple (LCM) of 4 and 10 is 20.
First, let's divide the whole numbers by 1/4 and 3/10:
2 divided by 1/4 equals (2 * 4)/1 = 8/1 = 8
2 divided by 3/10 equals (2 * 10)/3 = 20/3 ≈ 6.67
Now, let's plot these two values on a number line with increments of 1/20:
___0________________________1_________________________2_________________________3_________________________4_________________________5_________________________6_________________________7_________________________8_________________________9_________________________10
Our first fraction, 2/4 (which simplifies to 1/2), falls between the 0 and 1 markers.
Our second fraction, 8/20 (which can be simplified to 6/15 and further simplified to 2/5), falls between the 3 and 4 markers.
To represent 2 1/4 (or 9/4) cups of flour on the number line, we need to find a point between the 8 and 9 markers. Since 9/4 is larger than 9/20 but smaller than 10/20, let's plot it a little closer to the 9 marker:
___0________________________1_________________________2_________________________3_________________________4_________________________5_________________________6_________________________7_________________________8_______________________9/20_____9 1/4
This number line shows both fractions 1/2 and 2/5, as well as the value 9/4 cups of flour (2 1/4 cups).