Bài 1:
`a)6³.6^7. 6^5`
`=6^(3+7+5)`
`=6^15`
`b)17^9:17^5:17^2`
`=17^(9-5-2)`
`=17^2`
`c)27³.3³`
`=(3³)^3 .3³`
`=3^9 .3³`
`=3^(9+3)`
`=3^12`
`d)16^3 .64^5`
`=(4²)^3 .(4^3)^5`
`=4^6 .4^15`
`=4^(6+15)`
`=4^21`
`e)10^5 .100^5 .1000²`
`=10^5 .(10²)^5 .(10³)^2`
`=10^5 .10^10 .10^6`
`=10^(5+10+6)`
`=10^21`
Bài 2:
`a)11^60:11^58`
`=11^(60-58)`
`=11^2`
`=121`
`b)8^10:8^5:^4`
`=8^(10-5-4)`
`=8^1`
`=8`
`c)25^9:125^5`
`=(5^2)^9:(5^3)^5`
`=5^18:5^15`
`=5^(18-15)`
`=5³`
`=125`
`d)16^5:4^6:8^2`
`=(2^4)^5:(2²)^6:(2^3)^2`
`=2^20:2^12:2^6`
`=2^(20-12-6)`
`=2^2`
`=4`
Bài 3:
`a)58.75+58.50-58.25`
`=58.(75+50-25)`
`=58.100`
`=5800`
`b)27.39+27.63-2.27`
`=27.(39+63-2)`
`=27.100`
`=2700`
`c)156.25+5.156+156.14+36.156`
`=156.(25+5+14+36)`
`=156.80`
`=12480`
`d)12.35+35.182-35.94`
`=35.(12+182-84)`
`=35.100`
`=2500`
`e)48.19+48.115+67.104`
`=48.(19+115)+67.104`
`=48.134+67.104`
`=6432+6968`
`=13400`
`f)27.121-87.27+73.34`
`=27.(121-87)+73.34`
`=27.34+73.34`
`=34.(27+73)`
`=34.100`
`=3400`
`g)128.72+128.67+128.72+11.72`
`=128.(72+67)+72.(128+11)`
`=128.139+72.139`
`=139.(128+72)`
`=139.200`
`=27800`
