问题 解答题
正确合理的进行计算.
54-5.81×0.9

0.65×6.4-0.65×5.4

78÷0.25÷0.4.
答案

(1)54-5.81×0.9,

=54-5.229,

=48.771;

(2)0.65×6.4-0.65×5.4,

=0.65×(6.4-5.4),

=0.65×1,

=0.65;

(3)78÷0.25÷0.4,

=78÷(0.25×0.4),

=78÷0.1,

=780.

单项选择题
单项选择题