tolong dijawabnya soal saya no 1 sd 10

1. 15 derajat celcius - 30 derajat celcius.= - 30 derajat celcius
2. komutatif
3. distributif
4. 100*35 / 25*7 = 100/25 * 35/7 = 4*5 = 20
5. (-8-2+1) : 3 = 9/3 = 3
6. 47/9 = 5 2/9
7. 75/80 = 15/16
8. 4 2/3 : 2 2/3 = 14/3 : 8/3 = 14/3 * 3/8 = 14/8 = 1 6/8 = 1 3/4
9. 1/2 + 2/3 - 1/4 = 6/12 + 8/12 - 3/12 = 11/12
10. 3 3/4 + 1 2/3 : 1 1/2 * 3/4 - 2 2/5
3 3/4 + 5/3 : 3/2 * 3/4 - 2 2/5
3 3/4 + 5/3 * 2/3 * 3/4 - 2 2/5
3 3/4 + 5/6 - 2 2/5
3 45/60 + 50/60 - 2 24/60
3 95/60 - 2 24/60 = 1 71/60 = 2 11/60