问题 解答题

5×1.3÷5×1.3

99×10.1

58×10.1-5.8

128.8÷23+9.2×0.35.

答案

(1)5×1.3÷5×1.3,

=6.5÷5×1.3,

=1.3×1.3,

=1.69;

(2)99×10.1,

=99×10+99×0.1,

=990+9.9,

=999.9;

(3)58×10.1-5.8,

=(10.1-0.1)×5.8,

=10×5.8,

=58;

(4)128.8÷23+9.2×0.35,

=5.6+3.22,

=8.82.

选择题
单项选择题 A1型题