(-13)×2/3-(0.34×2/7)+1/3×(-13)-5/7×0.34这道题怎么算?

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(-13)×2/3-(0.34×2/7)+1/3×(-13)-5/7×0.34这道题怎么算?

(-13)×2/3-(0.34×2/7)+1/3×(-13)-5/7×0.34这道题怎么算?
(-13)×2/3-(0.34×2/7)+1/3×(-13)-5/7×0.34这道题怎么算?

(-13)×2/3-(0.34×2/7)+1/3×(-13)-5/7×0.34这道题怎么算?
(-13)×2/3-(0.34×2/7)+1/3×(-13)-5/7×0.34
= -13×(2/3+1/3)-0.34×(2/7+5/7)
= -13-0.34
= -13.34