62.5×5.4+6.25×46=62.5×5.4+62.5×4.6=62.5x(5.4+4.6)=62.5x10=625希望能帮到你!
62.5×5.4+6.25×46=6.25×54+6.25×46=6.25x(54+46)=6.25x100=625