jawab pakai cara terimakasih

1) ⅔ + 1⅓
= 2 ( B )

2) 2/5 + 3 1/10 + 2 3/5
= 4/10 + 3 1/10 + 2 6/10
= 5 11/10
= 6 1/10 ( C )

3) 2 3/10 + 1 2/5 + 6 ¼
= 2 6/20 + 1 8/20 + 6 5/20
= 9 19/20 ( A )

4) 2 ¹/5 - 2/3 - 2/15
= 2 3/15 - 10/15 - 2/15
= 1 18/15 - 10/15 - 2/15
= 1 6/15
= 1 2/5 ( D )