1>
a) 2/9 + 4/9
= 6/9 = 2/3
b) 2 3/5 + 4/5
=13/5 + 4/5
=17/5 = 3 2/5
c) ⅜ + 1/6
=9/24 + 4/24
=13/24
d) 3¼ + 2/7
=13/4 + 2/7
= 84/28 + 8/28
=92/28 = 3 8/28
e) 2 2/5 + 3 3/8
= 12/5 + 27/8
= 96/40 + 135/40
= 231/40
= 5 31/40
2>
a) 7/10 - 3/10
=4/10 = 3/5
b) 3/5 - ⅓
=9/15 - 5/15
= 4/15
c) 1⅛ - 3/5
= 11/8 - 3/5
= 55/40 - 24/40
= 11/40
d) 4 4/9 - 2¼
= 40/9 - 9/4
= 160/36 - 81/36
= 79/36 = 2 7/36
e) 5 3/10 - 2⅜
= 53/10 - 19/8
= 424/80 - 190/80
= 234/80 = 2 74/80 = 2 37/40
sorry kalo ada yg mleset -_-