1) (7/15 - 1/6) + 2/5Common denominator for 15 and 6 is 30:(14/30 - 5/30) + 12/30= 9/30 + 12/30= 21/30= 7/10Adding 2/5:7/10 + 2/5Common denominator for 10 and 5 is 10:(7/10 1/1) + (2/5 2/2)= 7/10 + 4/10= 11/10= 1 1/10
2) (3/8 - 1/9) + 25/36Common denominator for 8 and 9 is 72:(27/72 - 8/72) + 25/36= 19/72 + 25/36Common denominator for 72 and 36 is 72:(19/72 2/2) + (25/36 2/2)= 38/72 + 50/72= 88/72= 11/9= 1 2/9
1) (7/15 - 1/6) + 2/5
Common denominator for 15 and 6 is 30:
(14/30 - 5/30) + 12/30
= 9/30 + 12/30
= 21/30
= 7/10
Adding 2/5:
7/10 + 2/5
Common denominator for 10 and 5 is 10:
(7/10 1/1) + (2/5 2/2)
= 7/10 + 4/10
= 11/10
= 1 1/10
2) (3/8 - 1/9) + 25/36
Common denominator for 8 and 9 is 72:
(27/72 - 8/72) + 25/36
= 19/72 + 25/36
Common denominator for 72 and 36 is 72:
(19/72 2/2) + (25/36 2/2)
= 38/72 + 50/72
= 88/72
= 11/9
= 1 2/9