99×74+99
=99×(74+1)
=99×75
=(100-1)×75
=75×100-75×1
=7500-75
=7424
希望对大家有帮助
=99*(74+1)=99*75=(100-1)*75=100*75-1*75=7500-75=7425
99*74+99=74(100-1)+99=7400-74+99=7400+25=7425
99×74+99
=99×(74+1)
=99×75
=75×(100-1)
=75×10-75
=7500-75
=7425
99×74+99
=(100-1)×74+99
=100×74-74+99
=7400+25
=7425