如题所述
第1个回答 2021-02-26
这道题的简便计算为
878-(423+278)
=878-278-423
=600-423
=177
所以这道题的答案是177
878-(423+278)
=878-278-423
=600-423
=177
所以这道题的答案是177
第2个回答 2021-02-26
878-(423+278)
=(878-278)-423
=600-400-20-3
=200-20-3
=180-3
=177
=(878-278)-423
=600-400-20-3
=200-20-3
=180-3
=177
第3个回答 2021-02-26
878-(423+278)
=878-423-278
=878-278-423
=600-423
=177
=878-423-278
=878-278-423
=600-423
=177
第4个回答 2021-02-26
878-(423+278)
=878-423-278
=878-278-423
=600-423
=177
=878-423-278
=878-278-423
=600-423
=177
第5个回答 2021-02-26
878-(423+278)
=878-423-278
=(878-278)-423
=600-423
=177
=878-423-278
=(878-278)-423
=600-423
=177