(2x4x6x8x10+1x3x5x7x9)/(1x2x3x4x5)
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(2x4x6x8x10+1x3x5x7x9)/(1x2x3x4x5)
(10x9x8x7x6-5x4x3x2x1) / ( 3x4x5x6x)
(1x2x3x4x5x6+6x7x8x9x10x11) / (1x2x3x4x5x6)
(10x9x8x7x6-5x4x3x2x1) / ( 3x4x5x6x)
(1x2x3x4x5x6+6x7x8x9x10x11) / (1x2x3x4x5x6)
(1)
(2x4x6x8x10+1x3x5x7x9)/(1x2x3x4x5)
=(1x2x2x2x3x2x4x2x5x2+1x3x5x7x9)/(1x2x3x4x5)
=[1x2x3x4x5x(2x2x2x2x2)+1x3x5x7x9]/(1x2x3x4x5)
=2x2x2x2x2+1x3x5x7x9/(1x2x3x4x5)(进行约分)
=32+7x9/(2x4)
=32+63/8
=39.875
(2)
(10x9x8x7x6-5x4x3x2x1) / ( 3x4x5x6)
=(10x9x8x7x6)/ ( 3x4x5x6)-5x4x3x2x1/ (3x4x5x6)(进行约分)
=(5x3x4x7)-1/ 3
=420-1/3
=419又2/3
(3)
(1x2x3x4x5x6+6x7x8x9x10x11) /(1x2x3x4x5x6)
=(1x2x3x4x5x6)/( 1x2x3x4x5x6)+(6x7x8x9x10x11)/ (1x2x3x4x5x6)
=1+(6x7x8x9x10x11) /(1x2x3x4x5x6)(进行约分)
=1+7x2x3x11
=1+462
=463
(2x4x6x8x10+1x3x5x7x9)/(1x2x3x4x5)
=(1x2x2x2x3x2x4x2x5x2+1x3x5x7x9)/(1x2x3x4x5)
=[1x2x3x4x5x(2x2x2x2x2)+1x3x5x7x9]/(1x2x3x4x5)
=2x2x2x2x2+1x3x5x7x9/(1x2x3x4x5)(进行约分)
=32+7x9/(2x4)
=32+63/8
=39.875
(2)
(10x9x8x7x6-5x4x3x2x1) / ( 3x4x5x6)
=(10x9x8x7x6)/ ( 3x4x5x6)-5x4x3x2x1/ (3x4x5x6)(进行约分)
=(5x3x4x7)-1/ 3
=420-1/3
=419又2/3
(3)
(1x2x3x4x5x6+6x7x8x9x10x11) /(1x2x3x4x5x6)
=(1x2x3x4x5x6)/( 1x2x3x4x5x6)+(6x7x8x9x10x11)/ (1x2x3x4x5x6)
=1+(6x7x8x9x10x11) /(1x2x3x4x5x6)(进行约分)
=1+7x2x3x11
=1+462
=463
(2x4x6x8x10+1x3x5x7x9)/(1x2x3x4x5)
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