问题 解答题

12.5×198÷(18÷8)

1.2×8.64+1.136×12-2×0.12×50.

答案

(1)12.5×198÷(18÷8),

=12.5×198÷2.25,

=12.5×(8×24.75)÷2.25,

=(12.5×8)×24.75÷2.25,

=100×24.75÷2.25,

=2475÷2.25,

=1100;

(2)1.2×8.64+1.136×12-2×0.12×50,

=1.2×8.64+11.36×1.2-(2×50)×0.12,

=1.2×8.64+11.36×1.2-10×1.2,

=1.2×(8.64+11.36-10),

=1.2×(20-10),

=1.2×10,

=12.

单项选择题
多选题