数学题(-3)^4÷(9/4)^2+21/2×(-1/3)(-3)^4÷(9/4)^2+21/2×(-1/3)=?2-3步即可.

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数学题(-3)^4÷(9/4)^2+21/2×(-1/3)(-3)^4÷(9/4)^2+21/2×(-1/3)=?2-3步即可.数学题(-3)^4÷(9/4)^2+21/2×(-1/3)(-3)^4÷

数学题(-3)^4÷(9/4)^2+21/2×(-1/3)(-3)^4÷(9/4)^2+21/2×(-1/3)=?2-3步即可.
数学题(-3)^4÷(9/4)^2+21/2×(-1/3)
(-3)^4÷(9/4)^2+21/2×(-1/3)=?
2-3步即可.

数学题(-3)^4÷(9/4)^2+21/2×(-1/3)(-3)^4÷(9/4)^2+21/2×(-1/3)=?2-3步即可.
原式=81*16/81-7/2
=16-7/2
=12.5

(-3)^4÷(9/4)^2+21/2×(-1/3)
=81*16/81-7/2
=16-3.5=12.5

81÷(81/16)+(-7/2)=16-7/2=25/2=12.5

(-3)^4÷(9/4)^2+21/2×(-1/3)
=81÷(81/16)-7/2
=16-7/2
=25/2