求单项式3分之2x²y,-3分之2x²y,4分之1x²y的和.

求单项式3分之2x²y,-3分之2x²y,4分之1x²y的和.
求单项式3分之2x²y,-3分之2x²y,4分之1x²y的和.

求单项式3分之2x²y,-3分之2x²y,4分之1x²y的和.
3分之2x²y+(-3分之2x²y)+4分之1x²y
=3分之2x²y-3分之2x²y+4分之1x²y
=(3分之2-3分之2+4分之1)x²y
=4分之1x²y
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4分之1x²y

2/3x²y-2/3x²y+1/4x²y
=0+1/4x²y
=1/4x²y