How To Really Calculate In Your Head! by Williams Kenneth

Author:Williams, Kenneth [Williams, Kenneth]
Language: eng
Format: epub
Publisher: Unknown
Published: 2013-12-28T16:00:00+00:00

Take the Quiz

(a) 3 1/4 + 5 1/2

(b) 1 1/2 + 7 3/4

(c) 40 3/4 + 50 1/2

(d) 6 1/2 + 5 3/4

Answers to Quiz

(a) 8 3/4

(b) 9 1/4

(c) 91 1/4

(d) 12 1/4

Fractions Lesson 6

Fractions Beyond Halves and Quarters

The same methods we have used for halves and quarters also apply to other fractions.

So we can think of a whole one being divided into 2 halves or 3 thirds or 4 quarters, and so on.

We can write this as: 1 = 2/2 1 = 3/3 1 = 4/4 and so on forever.

5/5 equals one whole one.

And 6/5 equals 1 1/5 because five fifths of the six fifths make a whole one and we have six fifths.

Similarly, 9/7 equals 1 2/7 because 7/7 = 1.

Also, 16/5 = 3 1/5 because 5/5 = 1 and so 15/3 = 5 .

The easy way to simplify fractions is to divide the top number (known as the ‘numerator’) by the bottom number (known as the ‘denominator’).

So using the previous example, to simplify 16/5

Divide 16 by 5 to get 3 remainder 1.

So 16/5 = 3 1/5

Similarly for 20/3

Divide 20 by 3 to get 6 remainder 2 .

So 20/3 = 6 2/3 .

Download

Copyright Disclaimer:
This site does not store any files on its server. We only index and link to content provided by other sites. Please contact the content providers to delete copyright contents if any and email us, we'll remove relevant links or contents immediately.