Please help! Whoever answers gets brainliest!

Answer:
1) 10^9
2) 10^0
3) 10^3
Step-by-step explanation:
1) You divide 10^12 and 10^7 = 10^5
10^4 × 10^5 = 10^9
2) You divide 10^3 and 10^3 = 10^0
10^0 × 10^4 = 10^0
3) You multiply 10^4 × 10^3 × 10^6 = 10^13. Then you divide 10^13 and 10^10 = 10^3