3)(3)868-52-48 (4)1500-28-272 (5)415-74-26

2025-03-01 05:37:37
推荐回答(1个)
回答1:

简便计算
(3)868-52-48
=868-(52+48)
=868-100
=768
(4)1500-28-272
=1500-(28+272)
=1500-300
=1200
(5)415-74-26
=415-(74+26)
=415-100
=315