tentukan hasil oprasi pecahan berikut 1. 3/8÷1/3×4/5= 2. 3/5×4/6+3/10= 3. 5/7+3/6-1/21=

1) 3/8 ÷ ⅓ × 4/5
= 3/8 × 3/1 × 4/5
= 9/8 × 4/5
= 9/10

2) 3/5 × 4/6 + 3/10
= 4/10 + 3/10
= 7/10

3) 5/7 + 3/6 - 1/21
= 5/7 + 1/2 - 1/21
= 10/14 + 7/14 - 1/21
= 17/14 - 1/21
= 51/42 - 2/42
= 49/42
= 1 7/42
= 1 1/6