计算(0.1+0.12+0.123+0.1234)×(0.12+0.123+0.1234+0.12345)-(0.1+0
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计算
(0.1+0.12+0.123+0.1234)×(0.12+0.123+0.1234+0.12345)-(0.1+0.12+0.123+0.1234+0.12345)×(0.12+0.123+0.1234)
(0.1+0.12+0.123+0.1234)×(0.12+0.123+0.1234+0.12345)-(0.1+0.12+0.123+0.1234+0.12345)×(0.12+0.123+0.1234)
![计算(0.1+0.12+0.123+0.1234)×(0.12+0.123+0.1234+0.12345)-(0.1+0](/uploads/image/z/6730084-28-4.jpg?t=%E8%AE%A1%E7%AE%97%EF%BC%880.1%2B0.12%2B0.123%2B0.1234%EF%BC%89%C3%97%EF%BC%880.12%2B0.123%2B0.1234%2B0.12345%EF%BC%89-%EF%BC%880.1%2B0)
设(0.1+0.12+0.123+0.1234)=A,(0.12+0.123+0.1234)=B,则A-B=0.1,
(0.1+0.12+0.123+0.1234)×(0.12+0.123+0.1234+0.12345)-(0.1+0.12+0.123+0.1234+0.12345)×(0.12+0.123+0.1234)
=A×(B+0.12345)-(A+0.12345)×B
=AB+0.12345A-(AB+0.12345B)
=AB+0.12345A-AB-0.12345B
=0.12345×(A-B)
=0.12345×0.1
=0.012345.
(0.1+0.12+0.123+0.1234)×(0.12+0.123+0.1234+0.12345)-(0.1+0.12+0.123+0.1234+0.12345)×(0.12+0.123+0.1234)
=A×(B+0.12345)-(A+0.12345)×B
=AB+0.12345A-(AB+0.12345B)
=AB+0.12345A-AB-0.12345B
=0.12345×(A-B)
=0.12345×0.1
=0.012345.
计算(0.1+0.12+0.123+0.1234)×(0.12+0.123+0.1234+0.12345)-(0.1+0
(0.1+0.12+0.123+0.1234)*(0.12+0.123+0.1234+0.12345)-(0.1+0.1
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