计算:(2.35+1.3
答案:1 悬赏:60 手机版
解决时间 2021-01-17 22:38
- 提问者网友:温旧梦泪无声
- 2021-01-17 09:40
计算:(2.35+1.3
最佳答案
- 五星知识达人网友:北方的南先生
- 2021-01-17 09:48
设2.35+1.34+5.21=a,1.98+6.91=b,则:
(2.35+1.34+5.21)×(1.98+6.91+10)-(2.35+1.34+5.21+10)×(1.98+6.91),
=a×(b+10)-(a+10)×b,
=ab+10a-ab-10b,
=10a-10b,
=10×(a-b),
=10×[2.35+1.34+5.21-(1.98+6.91)],
=10×[2.35+1.34+5.21-1.98-6.91],
=10×0.01,
=0.1.
(2.35+1.34+5.21)×(1.98+6.91+10)-(2.35+1.34+5.21+10)×(1.98+6.91),
=a×(b+10)-(a+10)×b,
=ab+10a-ab-10b,
=10a-10b,
=10×(a-b),
=10×[2.35+1.34+5.21-(1.98+6.91)],
=10×[2.35+1.34+5.21-1.98-6.91],
=10×0.01,
=0.1.
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