问题 解答题

用递等式计算

360÷45×72

(600-384)×20÷36

(259+281)÷90

(1000-640)÷72.

答案

(1)360÷45×72

=8×72

=576;

(2)(600-384)×20÷36

=216×20÷36

=4320÷36

=120;

(3)(259+281)÷90

=540÷90

=6;

(4)(1000-640)÷72

=360÷72

=5.

阅读理解与欣赏
单项选择题