Fractions, SM-Bank 054

Evaluate the following number sentences, giving your answers in simplest form.

`7/12-1/4` (1 mark)

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`3/5-2/7` (2 marks)

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`1/2-4/9` (2 marks)

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Show Answers Only

a. `1/3`

b. `11/35`

c. `1/18`

Show Worked Solution

a. `7/12-1/4`	`=7/12- (1 xx 3)/(4 xx 3)`
	`= 7/12-3/12`
	`=1/3`

b. `3/5-2/7`	`=(3 xx 7)/(5 xx 7)- (2 xx 5)/(7 xx 5)`
	`= 21/35-10/35`
	`=11/35`

c. `1/2-4/9`	`=(1 xx 9)/(2 xx 9)- (4 xx 2)/(9 xx 2)`
	`= 9/18-8/18`
	`=1/18`