用递等式计算.(写出必要的计算过程,能简便的用简便方法计算) (9.4-5.8)×2.07 12.54-4.56
答案:1 悬赏:30 手机版
解决时间 2021-01-17 00:24
- 提问者网友:玫瑰园
- 2021-01-16 20:30
用递等式计算.(写出必要的计算过程,能简便的用简便方法计算) (9.4-5.8)×2.07 12.54-4.56
最佳答案
- 五星知识达人网友:拜訪者
- 2021-01-16 20:53
①(9.4-5.8)×2.07,
=3.6×2.07,
=7.452;
②12.54-4.56-3.44-1.54,
=(12.54-1.54)-(4.56+3.44),
=11-8,
=3;
③(9.36×5+9.36+9.36×2)×1.25,
=9.36×(5+2+1)×1.25,
=9.36×8×1.25,
=9.36×(8×1.25),
=93.6;
④7.236÷0.18-14.3×0.02,
=40.2-0.286,
=39.914.
=3.6×2.07,
=7.452;
②12.54-4.56-3.44-1.54,
=(12.54-1.54)-(4.56+3.44),
=11-8,
=3;
③(9.36×5+9.36+9.36×2)×1.25,
=9.36×(5+2+1)×1.25,
=9.36×8×1.25,
=9.36×(8×1.25),
=93.6;
④7.236÷0.18-14.3×0.02,
=40.2-0.286,
=39.914.
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