18.9*178.178+0.49-17.8*189.189,我知道答案为0.49,但要知道是怎么算的?Thanks a lot.
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18.9*178.178+0.49-17.8*189.189,我知道答案为0.49,但要知道是怎么算的?Thanksalot.18.9*178.178+0.49-17.8*189.189,我知道答案为
18.9*178.178+0.49-17.8*189.189,我知道答案为0.49,但要知道是怎么算的?Thanks a lot.
18.9*178.178+0.49-17.8*189.189,我知道答案为0.49,但要知道是怎么算的?
Thanks a lot.
18.9*178.178+0.49-17.8*189.189,我知道答案为0.49,但要知道是怎么算的?Thanks a lot.
18.9*178.178+0.49-17.8*189.189
=18.9*17.8*10.1+0.49-17.8*18.9*10.1
=0.49
18.9*178.178+0.49-17.8*189.189
=18.9*178.178-17.8*189.189+0.49
=18.9*17.8(10.01-10.01)+0.49
=0.49
18.9*178.178+0.49-17.8*189.189
=18.9*17.8*10.1+0.49-17.8*18.9*10.1
=0.49
18.9*178.178+0.49-17.8*189.189
=18.9*178.178-17.8*189.189+0.49
=18.9*17.8(10.01-10.01)+0.49
=0.49
等于0.49
18.9×178.178+0.49-17.8×189.189
=18.9×178.178-17.8×189.189+0.49
=18.9×17.8(10.01-10.01)+0.49
=0.49
18.9*178.178+0.49-17.8*189.189
=189*0.1*178*1.001+0.49+178*0.1*189*1.001
=0.49
18.9*178.178+0.49-17.8*189.189
18.9×178.178+0.49-17.8×189.189简便运算
简便计算 18.9*178.178+0.49-17.8*189.189
18.9*178.178+0.49-17.8*189.189简便运算,
18.9*178.178+0.49-17.8*189.18 简算
简算:18.9*178.178+0.49-17.8*189.18918.9*178.178+0.49-17.8*189.189
用简便方法计算:18.9×178.178+0.49—17.8×189.189
简便计算:18.9*178.178+0.49-17.8*189.189十万火急!
18.9×178.178+0.49-17.8×189.189=(简便运算)
请教小学数学:用简便方法计算18.9*178.178+0.49一17.8*189.189
199.199*198-198.198*199的简便运算 18.9*178.178 +0.49-17.8*189.189 的简便运算
199.199*198-198.198*199的简便运算 18.9*178.178 +0.49-17.8*189.189
18.9*178.178+0.49-17.8*189.189,我知道答案为0.49,但要知道是怎么算的?Thanks a lot.
巧算 199.199*198-198.198*199 189*178.178+0.49-17巧算 199.199*198-198.198*199 189*178.178+0.49-178*189.189?
199.199×198﹣198.198×199 18.9×178.178+0.49﹣17.8×189.189 这两题怎么用简便 简便方法
用简便方法计算下面各题.(1)199.199*198-198.198*199 (2)18.9*178.178+0.49-178.*189.189
用简便算法计算下面各题第一题:199.199×198-198.198×199第二题:18.9×178.178+0.49-17.8×189.189算式要全面,要完整!
189*178.178+0.49-17.8*189.189 如何简算