58x14x2425 =58x2425再乘以14 =35x14 =320
5\8×1\4×24\25(1\2+1\4+5\6)×1225-25×74\75
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1/8×5.75+1.25×4.25简便计算
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脱式计算.0.25×1.25×4×8 2.125× 1 4 +1.875÷4 (2.5-0.125)×0.8+6.24
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简算,2.02×8.5 1.25+4.6+0.75 1.6x7.5×1.25
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(—36)×(—4/9+5/6—7/2)=___?25×(—3/4)—(—25)×1/2+25×(1/4)=____?
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3.25×1.4= 7.28×3.2= 52.3×21= 62.5×8.3= 75.2×3.4= 13.6×1.5= 4
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(1/2-1/6)×5+1/4×4/5 11/28×8/33+13/14×25/26 4
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中的25^7-5^12=25^7-25^6=25^6×(25-1)=24×25^6=24×25×25^5=6000×25
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1×2×3×4+1=25=5²,2×3×4×5+1=121=11²,3×4×5×6+1=361=19