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(0.75+0.2)除0.25xZ5o%
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(0.75+0.2)除0.25xZ5o%
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答案和解析
(0.75+0.2)/0.25*2.5
=(3/4+1/5)×4×5/2
=3/4×4×5/2+1/5×4×5/2
=15/2+2
=7.5+2
=9.5
或:
(0.75+0.2)/0.25*2.5
=0.95×4×2.5
=0.95×(4×2.5)
=0.95×10
=9.5
=(3/4+1/5)×4×5/2
=3/4×4×5/2+1/5×4×5/2
=15/2+2
=7.5+2
=9.5
或:
(0.75+0.2)/0.25*2.5
=0.95×4×2.5
=0.95×(4×2.5)
=0.95×10
=9.5
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