Fraction Reivew

Comparing Fractions

100

1/2 + 1/3 > 1

False, I know 1/2 + 1/2 =1 and 1/3 is less than 1/2

200

4/9 + 2/4 > 1

False, I know that 4/9 < 1/2 and that 2/4 = 1/2.  So 1/2 +4/9 is less than 1

300

5/6 + 1/12 < 1

True!  5/6 +1/6 =1 and I know that 1/12 < 1/6

400

2/3 + 1/4 > 1

False, I know that 1/3 > 1/4 because a third divides the whole into 3 pieces and a 1/4 into 4 pieces.  Therefore, 2/3 + 1/4 < 1

500

9/12 + 1/4 < 1

False!  1/4 is equivalent to 3/12 which means that 9/12+3/12 =1

Fractions on a number line

100

On your white boards, add 1/3 + 2/9.  To do this show an equivalent fraction

Check number line on white.  1/3 = 3/9 and then add the 2/9 and it should be just past one half showing the answer of 5/9.

200

On a number line show 5/8 + 1/2

9/8

300

Show 1/4 + 2/3 on a number line

See whiteboard (11/12)

400

Show 5/6 + 4/5

See whiteboard

500

Show 1/2 plus 1/3

See white board