tolong dong kakak senin dikumpul

1. 1.2500= 3 angka penting
2. 0.0025= 2 angka penting
3. 130.5010= 6 angka penting
4. 12.36_542= 4 angka penting
5. 15_.524= 2 angka penting
6. 500_000= 3 angka penting
7. 1+23.50=.....
8. ....
9. ....
10.....