Common Myths Of Maths

I thought I just want to share on the approach to bar modeling involving fraction.

When we think about fraction we tend to want and make sure all denominator are equal. However, this approach is typically used for basic fraction manipulation (eg. 1/2 - 1/3 ->3/6 -2/6 = 1/6

In some situation, we actually try yo make the numerator equal instead.

Consider case , 2/3 of number of apples is equal 1/4 of numbers of pear. In this case, apple and pear are two different quantity and hence their parts are not equivalent. e.g. 1 part of apple does not equal 1 part of pear => total is not 3+4 parts

Instead , we should express 1/4 as 2/8 so that both numerators are equal and two parts of apple are indeed equals two parts of pear, meaning the unit are standardized.