Question

简算:13×2/3-0.34×（-2/7）+1/3×13+5/7×0.34

Answer 1


新野旁观者 知道合伙人
数学类认证行家 2017-11-15
0.34×2-0.34×2/7+1/3×(-3)-5/7x0.34
=0.34×（2-2/7-5/7）+1/3×（-3）
=0.34×1-1
=0.34-1
=-0.66

Answer 2

0.34×2-0.34×2/7+1/3×(-3)-5/7x0.34
=0.34×（2-2/7-5/7）+1/3×（-3）
=0.34×1-1
=0.34-1
=-0.66

Answer 3

Answer 4

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Answer 5

13×2/3-0.34×（-2/7）+1/3×13+5/7×0.34
=13×2/3+1/3×13+5/7×0.34-0.34×（-2/7）
=13（2/3+1/3）+0.34[5/7-（-2/7）]
=13+0.34
=13.34