简便运算4.28+(5.72-3.99)

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简便运算4.28+(5.72-3.99)
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简便运算4.28+(5.72-3.99)
简便运算4.28+(5.72-3.99)

简便运算4.28+(5.72-3.99)
=4.28+5.72-3.99
=10-(4-0.01)
=10-4+0.01
=6+0.01
=6.01

1.=4.28+5.72-3.99
=10-(4-0.01)
=10-4+0.01
=6+0.01
=6.01
2.=4.28+(5.72-4+0.01)
=4.28+1.73
=4.28+1.72+0.01
=6.01
望楼主采纳

=(4.28+5.72)-(4-0.01)
=10-4+0.01
=6.01