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快-0.85X8/17+14X2/7-(14X3/7-9/17X0.85)(X是乘号)
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快-0.85X8/17+14X2/7-(14X3/7-9/17X0.85)(X是乘号)
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答案和解析
-0.85X8/17+14X2/7-(14X3/7-9/17X0.85)
=-0.85X8/17+14X2/7-14X3/7+9/17X0.85
=(9/17X0.85-0.85X8/17)+(14X2/7-14X3/7)
=0.85/17-2
=0.05-2
=-1.95
=-0.85X8/17+14X2/7-14X3/7+9/17X0.85
=(9/17X0.85-0.85X8/17)+(14X2/7-14X3/7)
=0.85/17-2
=0.05-2
=-1.95
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