Question

Tolong jawaban dan cara dari:
1. 3/5 +1 2/4 - 5/20=
2. 2 1/6 : 1/4 x 5/8 =
3. 2/4 +1/8 x 5/6 =
4. 0,9 +3/4 + 2 1/5 +65%=

Answer 1

1. 3/5 + 6/4 - 5/20
= 12/20 + 30/4 - 5/20
= 37/20
= 1 17/20

2. 13/6 : 1/4 × 5/8
= 13/6 ×  4/1 × 5/8
= 260/48
= 5 20/48
= 5 5/12

3. 2/4 + 1/8 × 5/6
= 2/4 + 5/48
= 24/48 + 5/48
= 29/48

4. 0,9 + 3/4 + 11/5 + 65%
ubah ke bentuk pecahan desimal
= 0,9 + 0,75 + 2,2 + 0,65
= 4,5

Answer 2

1. 3/5 + 1 2/4 - 5/20
= 3/5 + 6/4 - 5/20 = (12 + 30 - 5)/20 = 37/20 = 1 17/20

2. (2 1/6 : 1/4) × 5/8
= (13/6 : 1/4) × 5/8
= (13/6 × 4/1) × 5/8
= 52/6 × 5/8
= 260/48 = 5 20/48 = 5 (20 : 4)/(48 : 4) = 5 5/12

3. 2/4 + (1/8 × 5/6) =
= 2/4 + 5/48
= (24 + 5)/48 = 29/48

4. 0,9 + 3/4 + 2 1/5 + 65%
= (9/10 + 3/4) + (11/5 + 13/20)
= (18 + 15)/20 + (44 + 13)/20
= 33/20 + 57/20 = 90/20 = 9/2 = 4 1/2
Jika hasilnya ke desimal :
9/2 = (9 × 50)/(2 × 50) = 450/100 = 45/10 = 4,5