Bài `1:`
`a)38×73+27×38`
`=38(73+27)`
`=38×100`
`=3800`
`b)5×3^2-32÷4^2`
`=5×9-32÷16`
`=45-2`
`=43`
`c)5×2^3+7^11÷7^9-1^8`
`=5×8+7^2-1`
`=40+49-1`
`=88`
`d)400÷{5×[360-(290+2×5^2)]}`
`=400÷{5×[360-(290+2×25)]}`
`=400÷{5×[360-(290+50)]}`
`=400÷{5×[360-340]}`
`=400÷{5×20}`
`=400÷100`
`=4`
`e)2^3×2^4×2^6`
`=2^(3+4+6)`
`=2^13`
`f)9^6÷3^2`
`=9^6÷9`
`=9^5`
CHÚC BẠN HỌC TỐT!!!