Contoh:
1. 13/5 - 0,15 + 3/4 =
Penyelesaian:
13/5 - 0,15 + 3/4 = 13/5 - 15/100 + 3/4
= 160/100 - 15/100 + 75/100
= 1120/100 = 220/100 = 21/5
Kerjakan soal di bawah ini dengan benar!
1. 3/4 + 1,25 + 11/5 = .......
2. 75% - 0,25 + 21/4 = .......
3. 14/5 - (0,2 + 3/4) = .......
4. 154/5 - 7,25 + 51/5 = .......
5. 0,85 - 0,27 + 21/5 = .......
6. 1/2 + 1,25 - 3/4 = .......
7. 71/2 - 6,25 + 35% =.........
8 . 6,8 - (25% + 21/4) - 1,5 = .....
9. 25% - (0,6 - 1/5) = ......
10. 82/5 - 4,5 + (14/5 - 50%) = ........
Kunci Jawaban dan pembahasan!
1. 3/4 + 1,25 - 11/5 = 3/4 + 125/100 - 11/5
= 75/100 + 125/100 - 120/100
= 80/100 = 4/5
2. 75% - 0,25 + 21/4 = 75/100 - 25/100 + 21/4
= 75/100 - 25/100 + 225/100
= 275/100 = 23/4
3. 14/5 - (0,2 + 3/4) =
0,2 + 3/4 = 2/10 + 3/4
= 4/20 + 15/20
= 19/20
14/5 - 19/20 = 116/20 - 19/20
= 36/20 - 19/20
= 17/20
4. 154/5 - 7,25 + 51/5 = 154/5 - 725/100+ 51/5
= 1580/100 - 725/100+ 520/100
= 1375/100
= 133/4
5. 0,85 - 0,27 + 21/5 = 0,85 - 0,27 + 2,2
= 2,78
6. 1/2 + 1,25 - 3/4 = 1/2 + 125/100 - 3/4
= 50/100 + 125/100 - 75/100
= 1
7. 71/2 - 6,25 + 35% = 71/2 - 625/100 + 35/100
= 750/100 - 625/100 + 35/100
= 160/100 = 13/5
8 . 6,8 - (25% + 21/4) - 1,5 =
25% + 21/4 = 25/100 + 21/4
= 25/100 + 225/100
= 250/100 = 21/2
6,8 - 21/2 - 1,5 = 68/10 - 21/2 - 15/10
= 68/10 - 25/10 - 15/10
= 43/10 - 15/10
= 313/10 - 15/10
= 28/10 = 24/5
9. 25% + (0,6 - 1/5) =
0,6 - 1/5 = 6/10 - 1/5
= 6/10 - 2/10
= 4/10
25% + 4/10 = 25/100 + 4/10
= 25/100 + 40/100
= 65/100 = 13/50
10. 82/5 - 4,5 + (14/5 - 50%) =
14/5 - 50% = 14/5 - 50/100
= 180/100 - 50/100
= 130/100 = 13/10
82/5 - 4,5 + 13/10 = 82/5 - 45/10 + 13/10
= 84/10 - 45/10 + 13/10
= 714/10 - 45/10 + 13/10
= 412/10 = 52/10 = 51/5
Komentar
Posting Komentar