125×48+125×33-125
=125x(48+33-1)
=125x80
=10000
112×97+336
=112x97+112x3
=112x(97+3)
=112x100
=11200
85×201-85
=85x(201-1)
=85x200
=17000
125×48+125×33-125
=125×(48+33-1)
=125×80
=10000
112×97+3336
=112×(100-3)+3336
=112×100-112×3+3336
=11200-336+3336
=11200+3000
=14200
85×201-85
=85×(201-1)
=85×200
=17000
125×48+125×33-125
=125×(48-1+33)
=125×80
=10000
112×97+3336
=112×(100-3)+3336
=11200-336+3336
=11200+3000
=14200
85×201-85
=85×(201-1)
=85×200
=17000
解:(1)125×(48+33)-125
=125×81-125
=125×(80+1)-125
=125×80+125×1-125
=10000+125-125
=10000
(2)=112×(100-3)+3336
=112×100-112×3+3336
=11200-336+3336
=11200+3000
=14200
(3)=85×(201-1)
=85×200
=17000