亲,计算过程如下,参考一下吧!
87×27-27×27+41×27-21
=(87-27+41)x27-21
=101x27-21
=(100+1)x27-21
=100x27+27-21
=2700+(27-21)
=2700+6
=2706
87×27-27×27+41×27-21
=27×(87-27+41)-21
=27×(101)-21
=27×(100+1)-21
=27×100+27×1-21
=2700+27-21
=2700+(27-21)
=2700+6
=2706