数学简便计算-32x4/3x3/2=?10/9X6/5x5/4=?7/3x14x9/2=?18/25x15/4x20/9=?
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数学简便计算-32x4/3x3/2=?10/9X6/5x5/4=?7/3x14x9/2=?18/25x15/4x20/9=?
数学简便计算-32x4/3x3/2=?10/9X6/5x5/4=?7/3x14x9/2=?18/25x15/4x20/9=?
数学简便计算-32x4/3x3/2=?10/9X6/5x5/4=?7/3x14x9/2=?18/25x15/4x20/9=?
-32x4/3x3/2
=-32x(4/3x3/2)
=-32x2
=-64
10/9X6/5x5/4
=10/9x(6/5x5/4)
=10/9x3/2
=5/3
7/3x14x9/2
=(7/3x9/2)x14
=21/2x14
=147
18/25x15/4x20/9
=(18/25x20/9)x15/4
=8/5x15/4
=6
-32*4/3*3/2=-32*4/2=-64
10/9*6/5*5/4=10/9*6/4=10/(3*3)*(3*2)/4=(4*2.5)/3*2/4=5/3
7/3*14*9/2=7/3*7*2*9/2=49/3*9=49*3=147
18/25*15/4*20/9=18/(5*5)*(5*3)/4*(5*4)/9=18/5*3/4*5*4/9=2/5*3/4*5*4=2*3=6
5+5/1x2+5/2x3+5/2x3+5/3x4+.+5/99x100= (简便计算)
数学简便计算-32x4/3x3/2=?10/9X6/5x5/4=?7/3x14x9/2=?18/25x15/4x20/9=?
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