27.38-5.34+2.62-4.66怎样简便计算还有:15.7-4.3+3.54+4.3我要简便计算公式

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27.38-5.34+2.62-4.66怎样简便计算还有:15.7-4.3+3.54+4.3我要简便计算公式27.38-5.34+2.62-4.66怎样简便计算还有:15.7-4.3+3.54+4.3

27.38-5.34+2.62-4.66怎样简便计算还有:15.7-4.3+3.54+4.3我要简便计算公式
27.38-5.34+2.62-4.66怎样简便计算
还有:
15.7-4.3+3.54+4.3
我要简便计算公式

27.38-5.34+2.62-4.66怎样简便计算还有:15.7-4.3+3.54+4.3我要简便计算公式
27.38-5.34+2.62-4.66=(27.38+2.62)-(5.34+4.66)=30-10=20
15.7-4.3+3.54+4.3=15.7+3.54+(4.3-4.3)=15.7+3.54=19.24

=27.38+2.62-(5.34+4.66)
=5-10
=-5

=27.38+2.62-(5.34+4.66)
=5-10
=5


第一题=(27.38+2.62)-(5.34+4.66)=30-10=20
第二题 =15.7+3.54+(4.3-4.3)=19.24

15.7-4.3+3.54+4.3=15.7+3.54-4.3+4....

全部展开

=27.38+2.62-(5.34+4.66)
=5-10
=5


第一题=(27.38+2.62)-(5.34+4.66)=30-10=20
第二题 =15.7+3.54+(4.3-4.3)=19.24

15.7-4.3+3.54+4.3=15.7+3.54-4.3+4.3=19.24
27.38-5.34+2.62-4.66=27.38+2.62-5.34-4.66=30-(5.34+4.66)=30-10=20

2010-10-17 16:50
27.38-5.34+2.62-4.66
=(27.38+2.62)-(5.34+4.66)
=30-10
=20
15.7-4.3+3.54+4.3
=15.7+3.54+4.3-4.3
=15.7+3.54
=19.24

收起

第一题=(27.38+2.62)-(5.34+4.66)=30-10=20
第二题 =15.7+3.54+(4.3-4.3)=19.24
第二题你是不是题目写错了?

15.7-4.3+3.54+4.3=15.7+3.54-4.3+4.3=19.24
27.38-5.34+2.62-4.66=27.38+2.62-5.34-4.66=30-(5.34+4.66)=30-10=20

27.38-5.34+2.62-4.66
=(27.38+2.62)-(5.34+4.66)
=30-10
=20
15.7-4.3+3.54+4.3
=15.7+3.54+4.3-4.3
=15.7+3.54
=19.24