(-2)^8+(-2)^9
=256-512
=-256
7.9x201.3+4.3x201.3-1.9x201.3
=201.3x(7.9+4.3-1.9)
=201.3x10.3
=201.3x10+201.3x0.3
=2013+60.39
=2073.39
如果本题有什么不明白可以追问,
另外发并点击我的头像向我求助,请谅解,
(-2)^8+(-2)^9
=256-512
=-256
7.9x201.3+4.3x201.3-1.9x201.3
=201.3x(7.9+4.3-1.9)
=201.3x10.3
=201.3x10+201.3x0.3
=2013+60.39
=2073.39
如果本题有什么不明白可以追问,
另外发并点击我的头像向我求助,请谅解,