简算:33×149.7-49.7×15.33
答案:2 悬赏:40 手机版
解决时间 2021-11-09 14:22
- 提问者网友：寂寞梧桐
- 2021-11-08 19:58
简算:33×149.7-49.7×15.33
最佳答案
- 五星知识达人网友：往事隔山水
- 2021-11-08 20:16
33×149.7-49.7×15.33
＝33x(100+49.7)-49.7×15.33
=33x100+33x49.7-49.7×15.33
=3300+49.7x(33-15.33)
=3300+(50-0.3)x((33-15.33)
=3300+50x33-50x15.33-0.3x33+0.3x15.33
=3300+1650- 766.5-9.9+4.599
=3300+1650-(766.5+9.9)+4.599
=4950-776.4+4.599
=4950+4.599-776.4
=4178.199
＝33x(100+49.7)-49.7×15.33
=33x100+33x49.7-49.7×15.33
=3300+49.7x(33-15.33)
=3300+(50-0.3)x((33-15.33)
=3300+50x33-50x15.33-0.3x33+0.3x15.33
=3300+1650- 766.5-9.9+4.599
=3300+1650-(766.5+9.9)+4.599
=4950-776.4+4.599
=4950+4.599-776.4
=4178.199
全部回答
- 1楼网友：未来江山和你
- 2021-11-08 20:35
33×149.7-49.7×15.33
＝33×(100+49.7) - 49.7×(15+0.33)
= 3300 + 18×49.7 - 0.33×49.7
= 3300 + 18×50 - 0.33×50 + 0.33×0.3－5.4
= 4200 - 16.5 + 0.099 - 5.4
= 4178.199
＝33×(100+49.7) - 49.7×(15+0.33)
= 3300 + 18×49.7 - 0.33×49.7
= 3300 + 18×50 - 0.33×50 + 0.33×0.3－5.4
= 4200 - 16.5 + 0.099 - 5.4
= 4178.199
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