问题 解答题

脱式计算下列各题.

(1)13.7+8.65-9.628

(2)12.8-(4.38+1.614)

答案

(1)13.7+8.65-9.628,

=22.35-9.628,

=12.722;

(2)12.8-(4.38+1.614)

=12.8-5.994

=6.806.

单项选择题
双选题