脱式计算.(1)2400÷80+14×12 (2)420÷[(205-198)×4] (3)63×73-63×63 (4)25×44 (5
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解决时间 2021-03-07 12:58
- 提问者网友:醉人眸
- 2021-03-07 00:40
脱式计算.(1)2400÷80+14×12 (2)420÷[(205-198)×4] (3)63×73-63×63 (4)25×44 (5)57×19+57 (6)85×(100+1)
最佳答案
- 二级知识专家网友:佛说妍妍很渣
- 2021-03-07 01:10
(1)2400÷80+14×12,
=30+168,
=198;
(2)420÷[(205-198)×4],
=420÷[7×4],
=420÷7÷4,
=60÷4,
=15;
(3)63×73-63×63,
=63×(73-63),
=63×10,
=630;
(4)25×44,
=25×4×11,
=100×11,
=1100;
(5)57×19+57,
=57×(19+1),
=57×20,
=1140;
(6)85×(100+1),
=85×100+85×1,
=8500+85,
=8585.
=30+168,
=198;
(2)420÷[(205-198)×4],
=420÷[7×4],
=420÷7÷4,
=60÷4,
=15;
(3)63×73-63×63,
=63×(73-63),
=63×10,
=630;
(4)25×44,
=25×4×11,
=100×11,
=1100;
(5)57×19+57,
=57×(19+1),
=57×20,
=1140;
(6)85×(100+1),
=85×100+85×1,
=8500+85,
=8585.
全部回答
- 1楼网友:何以畏孤独
- 2021-03-07 01:54
同问。。。
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