5-6题,

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5-6题,5-6题, 5-6题,5.解:通分得:(64+32+16+8+4+1)/128＝125/1286.解:＝3.14×(-35.2-46.6-18.2)＝3.14×(-100)＝-31

5-6题,
5-6题,

5-6题,

5.解:通分得:(64+32+16+8+4+1)/128＝125/128
6.解:＝3.14×(-35.2-46.6-18.2)＝3.14×(-100)＝-314