脱式计算下列各小题,写出计算步骤. (98+76)×(98-76) 937-(256×5-763) 279+(345-1
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解决时间 2021-03-20 22:59
- 提问者网友:寂寞撕碎了回忆
- 2021-03-20 00:12
脱式计算下列各小题,写出计算步骤. (98+76)×(98-76) 937-(256×5-763) 279+(345-1
最佳答案
- 五星知识达人网友:毛毛
- 2021-03-20 01:08
(1)(98+76)×(98-76),
=174×22,
=3828;
(2)937-(256×5-763),
=937-(1280-763),
=937-517,
=420;
(3)279+(345-145×2),
=279+(345-290),
=279+55,
=334;
(4)1000-(75×3+763),
=1000-(225+763),
=1000-988,
=12.
=174×22,
=3828;
(2)937-(256×5-763),
=937-(1280-763),
=937-517,
=420;
(3)279+(345-145×2),
=279+(345-290),
=279+55,
=334;
(4)1000-(75×3+763),
=1000-(225+763),
=1000-988,
=12.
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