1.7-(4.875-2.75)×80% 简便运算?
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解:1.7一(4.875一2.75)×80%
=1.7一2.125×0.8
=1.7一(2+0.125)×0.8
=1.7一(1.6+0.1)
=1.7一1.7
=0
=1.7一2.125×0.8
=1.7一(2+0.125)×0.8
=1.7一(1.6+0.1)
=1.7一1.7
=0
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1.7-(4.875-2.75)×80%
=1.7-2.125×80%
=1.7-(2+0.125)×0.8
=1.7-(1.6+0.1)
=1.7-1.7
=0
=1.7-2.125×80%
=1.7-(2+0.125)×0.8
=1.7-(1.6+0.1)
=1.7-1.7
=0
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1.-(4.875-2.75)×80/%
=1-(4.875-2.75)×0.4
=1-1.95+1.1
=2.1-1.95
=1-1+1-0.95+0.1
=0+0.05+0.1
=015
=1-(4.875-2.75)×0.4
=1-1.95+1.1
=2.1-1.95
=1-1+1-0.95+0.1
=0+0.05+0.1
=015
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1.7-2.125×80%=1.7-(2+5/40)×80%=1.7-1.6-0.1=0
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1.7-(4.875-2.75)x80%
=1.7-2.125x80%
=1.7-(2+0.125)x80%
=1.7-(2x80%+0.125ⅹ80%)
=1.7-(1.6+0.1)
=1.7-1.7
=0
=1.7-2.125x80%
=1.7-(2+0.125)x80%
=1.7-(2x80%+0.125ⅹ80%)
=1.7-(1.6+0.1)
=1.7-1.7
=0
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