3.6*31.4+43.9*6.4怎样简便运算

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3.6*31.4+43.9*6.4怎样简便运算

3.6*31.4+43.9*6.4怎样简便运算
3.6*31.4+43.9*6.4怎样简便运算

3.6*31.4+43.9*6.4怎样简便运算
(1)用计算器是铁定简单的.
(2)3.6*31.4+43.9*6.4
=3.6*(43.9-12.5)+43.9*6.4
=439-3.6*12.5
=394

3.6*31.4+43.9*6.4=3.6*31.4+(12.5+31.4)*6.4=31.4*(3.6+6.4)+12.5*6.4=314+80=394

394 =113.04 280.96 =394 3.6乘31.4 43.9乘6.4 =3.6*31.4 (31.4 12.5)*6.4 =3.6*31.4 31.4*6.4 12.5*6.4 =31.

3.6*31.4+43.9*6.4怎样简便运算 11-3.6+6.4怎样简便运算 31.4*72%+0.314*28 怎样简算 (6.4 3.2)/8怎样简算 0.125乘6.4怎样简算? 14.5*64+6.4*55 怎样简算? 4.2* 3.6+58* 0.36怎样简算............... 3.6*1.09+1.2*67.3怎样简算 怎样化简比 怎样简算 这道题怎样简算 怎样简算 这道题怎样简算? 怎样简算? 怎样化简比例 怎样化简 怎样简算 怎样化简!