能简算的要简算0.6+3/5×5/8-3/8×60% 29×(3.8-4/5)÷(13/8+5/8
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2014-01-22
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0.6+3/5×5/8-3/8×60%
=3/5+3/5 x5/8 -3/8 x3/5
=3/5x (1+5/8-3/8)
=3/5 x5/4
=3/4
29×(3.8-4/5)÷(13/8+5/8)
=29 x 3 ÷9/4
=29x3 x4/9
=29x4/3
=(30-1) x4/3
=40-4/3
=38又2/3
=3/5+3/5 x5/8 -3/8 x3/5
=3/5x (1+5/8-3/8)
=3/5 x5/4
=3/4
29×(3.8-4/5)÷(13/8+5/8)
=29 x 3 ÷9/4
=29x3 x4/9
=29x4/3
=(30-1) x4/3
=40-4/3
=38又2/3
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