问题 解答题
脱式计算.
17.5÷12.5×1.41.58×99+1.584.38÷0.125÷86.4×4.5+3.6×4.5.
答案

(1)17.5÷12.5×1.4,

=1.4×1.4,

=1.96;

(2)1.58×99+1.58,

=1.58×(99+1),

=1.58×100,

=158;

(3)4.38÷0.125÷8,

=4.38÷(0.125×8),

=4.38÷1,

=4.38;

(4)6.4×4.5+3.6×4.5,

=(6.4+3.6)×4.5,

=10×4.5,

=45.

单项选择题
综合