tolong di jawab ya...

4a no 5d maaf kalau salah

4. B
= 1 1/5 - 7/10
= 6/5 - 7/10
=12/10 - 7/10
= 5/10 disederhanakan = 1/5

5. B
= 1 2/3 : 5/6 - 1 1/7
= (5/3 : 5/6) - 8/7
= (5/3 x 6/5) - 8/7
= 2/1 - 8/7
= 14/7 - 8/7
= 6/7