Question

脱式计算,用分数表示 1/3-1/2+4/5-5/6 3/4×0.25-2×4/5 7/8+4/7+2/3-5

Answer 1

1/3-1/2+4/5-5/6
=1/6-5/6+4/5
=-2/3+4/5
=2/15
3/4×0.25-2×4/5
=3/16-8/5
=113/90
7/8+4/7+2/3-5
=81/56+2/3-5
=355/168-5
=-485/840
=-97/168

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