简便计算： 6.47x52+64.7x4.8 【请全部用递等式计算】 0.41x1.59-4.83x0.59+4.42X0.59
答案:1 悬赏:40 手机版
解决时间 2021-02-14 21:23
- 提问者网友：欲劫无渡
- 2021-02-14 09:32
简便计算： 6.47x52+64.7x4.8 【请全部用递等式计算】 0.41x1.59-4.83x0.59+4.42X0.59
最佳答案
- 五星知识达人网友：三千妖杀
- 2021-02-14 10:47
6.47x52+64.7x4.8
＝6.47x52+6.47x48
＝6.47x(52+48)
=6.47x10
=647
0.41x1.59-4.83x0.59+4.42X0.59
=0.41x1+0.41x0.59-4.83x0.59+4.42X0.59
=0.41+0.59x(0.41-4.83+4.42)
=0.41+0
=0.41
＝6.47x52+6.47x48
＝6.47x(52+48)
=6.47x10
=647
0.41x1.59-4.83x0.59+4.42X0.59
=0.41x1+0.41x0.59-4.83x0.59+4.42X0.59
=0.41+0.59x(0.41-4.83+4.42)
=0.41+0
=0.41
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