Bài 5:
1: \(2^7\cdot8=2^7\cdot2^3=2^{10}\)
2: \(2^{10}\cdot8=2^{10}\cdot2^3=2^{13}\)
3: \(3^{15}\cdot9=3^{15}\cdot3^2=3^{17}\)
4: \(6^4\cdot36=6^4\cdot6^2=6^6\)
5: \(2^{20}:8=2^{20}:2^3=2^{17}\)
6: \(4^{20}:16=4^{20}:4^2=4^{18}\)
7: \(3^5:27=3^5:3^3=3^{5-3}=3^2\)
8: \(5^8:25=5^8:5^2=5^6\)
9: \(4^{16}:16=4^{16}:4^2=4^{14}\)
10: \(6^{12}:36=6^{12}:6^2=6^{12-2}=6^{10}\)
11: \(7^8:49=7^8:7^2=7^6\)
12: \(8^4:64=8^4:8^2=8^2\)
13: \(9^7:81=9^7:9^2=9^5\)
14: \(2^{40}:32=2^{40}:2^5=2^{35}\)
15: \(3^{100}:27=3^{100}:3^3=3^{100-3}=3^{97}\)
16: \(5^{25}:25=5^{25}:5^2=5^{23}\)
17: \(8^{19}:64=8^{19}:8^2=8^{17}\)
18: \(12^8:144=12^8:12^2=12^6\)
19: \(121:11^2=11^2:11^2=11^0=1\)
20: \(10^{100}:1000=10^{100}:10^3=10^{97}\)
21: \(64\cdot8^{64}=8^2\cdot8^{64}=8^{66}\)
22: \(125\cdot5^9=5^3\cdot5^9=5^{12}\)
23: \(36\cdot6^{12}=6^2\cdot6^{12}=6^{2+12}=6^{14}\)
24: \(27\cdot3^{27}=3^3\cdot3^{27}=3^{30}\)