问题 解答题
计算下面各题.
0.8×6.3-0.8×3.321.36÷0.8-12.97.28+3.2÷2.5.
答案

(1)0.8×6.3-0.8×3.3,

=0.8×(6.3-3.3),

=0.8×3,

=2.4;

(2)21.36÷0.8-12.9,

=26.7-12.9,

=13.8;

(3)7.28+3.2÷2.5,

=7.28+1.28,

=8.56.

单项选择题