答
52×38+26×24
=26x2x38+26x24
=26x76+26x24
=26x(76+24)
=26x100
=2600
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52×38+26×24
=(26×2)×38+26×24
=26×(2×38)+26×24
=26×76+26×24
=26×(76+24)
=26×100
=2600
52×38+26×24=26*2*38+26*24
=26*(2*38+24)
=26*100
2600
=(50+2)(40-2)+(25+1)(25-1)=50*40+2*(40-50)-4+25*25-1=2000-20-4+625-1=2600