• 1. (2022五上·宣州期末) 直接写得数。

  100×0.9 =   0.99÷0.01=   0 ÷4.5 +5.5 =

  0.25×0.2×4 =   1.25×0.8=   0.45÷45 =

  8a -7a =   0.5×4÷0.5×4 =