计算下列的各式(32a^3b^2+8a^2b-2a^2b^2)/4a^2b(125m^6-10m^4+5m^2)/(-15m^2)(48a^4b^-1-9a^3-12a^-2)/(-3a^2)用小数表示下列各数:3乘10^-8=7.2乘10^-3=21.3乘10^-7=805乘10^-6=

Question

计算下列的各式
(32a^3b^2+8a^2b-2a^2b^2)/4a^2b
(125m^6-10m^4+5m^2)/(-15m^2)
(48a^4b^-1-9a^3-12a^-2)/(-3a^2)
用小数表示下列各数:3乘10^-8=_ 7.2乘10^-3=__ 21.3乘10^-7=__
805乘10^-6=__

Answer 1

8ab+2-b
-25/3 m^4+2/3m^2-1/3
-16a^2b^-1+3a+4a^-4
0.00000003
0.0072
0.00000213
0.000805