The next day I read 1\24 of the whole book more than the first day.

I read 2/24+ 1/24=3/24 of the whole book the next day.

How many parts of this book have not been read?

= 1-(2/24+3/24)

= 1-5/24

= 19/24

Step 2: Separation

( 1)3\8+5\6-7\ 12

=9/24+20/24- 14/24

=29/24- 14/24

= 15/24

=5/8

(2)9\20+4\ 15+ 1\6

=54/ 120+32/ 120+20/ 120

= 106/ 120

=53/60

(3)3\5+7\ 10-8\ 15

= 18/30+2 1/30- 16/30

=39/30- 16/30

=23/30

(4)3\7-8\2 1+9\ 14

= 18/42- 16/42+27/42

=2/42+27/42

=29/42

be simple

( 1)3\4+9\20+6\20

=3/4+ 15/20

=3/4+3/4

=6/4

= 1.5

(2)2\5- 1\2+3\5

=2/5+3/5- 1/2

= 1- 1/2

= 1/2

(3)5\ 12-(5\ 12-2\5)

=5/ 12-5/ 12+2/5

=0+2/5

=2/5

(4)23\39+5\ 13+8\ 13

=23/39+ 13/ 13

= 1 and 23/39