tolong di jawab pakai jalan

smoga membantu anda:)

1. 1 1/2+2/3+3/4
=3/2+2/3+3/4
=18/12+8/12+9/12
=35/12
=2 11/12
2. 2 1/2+2 1/4+3/5
=5/2+9/4+3/5
=50/20+45/20+12/20
=107/20
=5 7/20
3.3 1/4+2 1/2+5/6
=13/4+5/4+5/6
=39/12+15/12+10/12
=64/12
=5 4/12
=4 1/3

semoga membantu:)