2.74÷5/14+7.26*2.8 简20000÷12.5÷25÷0.8÷438*1/4+17*0.25+45*25%2.78*7.8+2.78*3.2-2.78 能简要简
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2.74÷5/14+7.26*2.8
=2.74×2.8+7.26×2.8
=2.8×(2.74+7.26)
=2.8×10
=28
20000÷12.5÷25÷0.8÷4
=20000×25/2×1/25×5/4×1/4
=20000×1/800
=25
38*1/4+17*0.25+45*25%
=38×1/4+17×1/4+45×1/4
=(38+17+45)×1/4
=100×1/4
=25
2.78*7.8+2.78*3.2-2.78
=2.78×(7.8+3.2-1)
=2.78×10
=2.78。
=2.74×2.8+7.26×2.8
=2.8×(2.74+7.26)
=2.8×10
=28
20000÷12.5÷25÷0.8÷4
=20000×25/2×1/25×5/4×1/4
=20000×1/800
=25
38*1/4+17*0.25+45*25%
=38×1/4+17×1/4+45×1/4
=(38+17+45)×1/4
=100×1/4
=25
2.78*7.8+2.78*3.2-2.78
=2.78×(7.8+3.2-1)
=2.78×10
=2.78。
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