问题 解答题
用递等式计算下面各题.
(34+19)×(252÷12)
300-156+2446×58-(275+38)140-40×2+28.
答案

(1)(34+19)×(252÷12),

=53×21,

=1113;

(2)300-156+244,

=144+244,

=388;

(3)6×58-(275+38),

=348-313,

=35;

(4)140-40×2+28,

=140-80+28,

=60+28,

=88.

选择题
单项选择题