简算 6.48-(2.48-1.52) 45.2-0.7-15.2-8.3 (7+41+74+414+744+4144)×2.5
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解决时间 2021-01-27 04:04
- 提问者网友:萌卜娃娃
- 2021-01-26 04:43
简算 6.48-(2.48-1.52) 45.2-0.7-15.2-8.3 (7+41+74+414+744+4144)×2.5
最佳答案
- 五星知识达人网友:人间朝暮
- 2021-01-26 05:04
6.48-(2.48-1.52)
=6.48-2.48+1.52
=4+1.52
=5.52
45.2-0.7-15.2-8.3
=45.2-15.2-(0.7+8.3)
=30-9
=21
(7+41+74+414+744+4144)×2.5
=(48+488+4888)×2.5
=48×2.5+488×2.5+4888×2.5
=120+1220+12220
=13560
=6.48-2.48+1.52
=4+1.52
=5.52
45.2-0.7-15.2-8.3
=45.2-15.2-(0.7+8.3)
=30-9
=21
(7+41+74+414+744+4144)×2.5
=(48+488+4888)×2.5
=48×2.5+488×2.5+4888×2.5
=120+1220+12220
=13560
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