简便计算87×26+13×35-39×27+52×14+169×2

2024-11-25 01:52:57
推荐回答(4个)
回答1:

87×26+13×35-39×27+52×14+169×2
=87×2×13+13×35-13×3×27+13×4×14+13×13×2
=13×(87×2+35-3×27+4×14+13×2)
=13×(174+35-81+56+26)
=13×210
=2730

回答2:

87×26+13×35-39×27+52×14+169×2
=87×26+13×35-13×81+13×56+13×26
=(87×26+13×26)+(13×35-13×81+13×56)
=26×(87+13)+13×(35-81+56)
=26×100+13×10
=2600+130
=2730

回答3:

87×26+13×35-39×27+52×14+169×2
=87×26+13×13×2+13×35+13×4×14-13×3×27
=(87+13)×26+13×(35+56-81)
=2600+130
=2730

回答4:

=13x(87x2+35-3x27+4x14+13x2)
=13x(174+35-81+56+26)
=13x(200+10)
=2600+130
=2730