50.99—17.11 39.01—23.89 怎样简便计算

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50.99—17.1139.01—23.89怎样简便计算50.99—17.1139.01—23.89怎样简便计算50.99—17.1139.01—23.89怎样简便计算50.99-17.11=51-0

50.99—17.11 39.01—23.89 怎样简便计算
50.99—17.11 39.01—23.89 怎样简便计算

50.99—17.11 39.01—23.89 怎样简便计算
50.99-17.11
=51-0.01-17-0.11
=51-17-(0.01+0.11)
=34-0.12
=33+1-0.12
=33+0.88
=33.88
39.01-23.89
=39+0.01-24+0.11
=25+0.01+0.11
=25+0.12
=25.12
50.99—17.11+ 39.01—23.89=33.88+25.12=49

50.99—17.11+39.01—23.89
=(50.99+39.01)-(17.11+23.89)
=90-41
=49

专业教师为你解答。(知识就是力量!)
你好,这是一题吗?
50.99-17.11+39.01-23.89
=(50.99+39.01)-(17.11+23.89)
=90-41
=49

如果是两题,则这样算:
50.99-17.11
=51-0.01-17-0.11
=51-17-(0.01+0.11)
=...

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专业教师为你解答。(知识就是力量!)
你好,这是一题吗?
50.99-17.11+39.01-23.89
=(50.99+39.01)-(17.11+23.89)
=90-41
=49

如果是两题,则这样算:
50.99-17.11
=51-0.01-17-0.11
=51-17-(0.01+0.11)
=34-0.12
=33.88
39.01-23.89
=39+0.01-24+0.11
=39-24+0.01+0.11
=15+0.12
=15.12
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50.99 - 17.11
= 50.99 - 20.11 + 3
= 33.88

39.01 - 23.89
= 39.01 - 24 + 0.11
= 15.12

50.99 - 17.11 + 39.01 - 23.89
= (50.99 + 39.01) - (17.11 + 23.89)
= 90 - 41
= 49