提公因式1.×6.6＋2.5××4.25+÷60.625×0.5++×62.5%0.25×63.5－×22×+25×75%-7×0.75×2.5-××+÷+49.5×-(50-)×0.6897×－37.5%+104×0.3753.5×+1.25×+3.8÷72×156-56×720.125×+×8.25+12.5%709×99+7092×6.6+2.5×675.3×99+75.3乘法分配律2.5×(+++)45×(+－0.6)×(－5.375)×(－÷)(111+999)÷[56×(-)]56×(-)小数点移动4.6×3.7+54×0.375.9×7.6+0.59×2475.3×99+7.534.6×3.7+54×0.37×4.46+55.6×7.5%16×1.5-0.15×35%×+0.065×7.5分因试25×32×1250.25×48×52.5×64×1.2525%×32×1.252.5×32×1.2525×3.2×12.5拆开71×9=71*(10-1)299×101563×9992.5××0.4×212.5×99199×201＋+++交换律×÷0.4×125×25×0.832×125×258×0.4×12.5×2.5－－6+++5.48++7.2++2.25+++－++0.75+++0.375＋+++－(+)5--48.3--+3.125+++(-1.8)71×9299×101563×9992.5××0.4×211―6―115―4.25―56+3+6+5.44+2.25+5+737-3.25-(1.37+1.75)（一）a+b+c=a+(b+c),a+b-c=a+(b-c),a-b+c=a–(b-c),a-b-c=a-(b+c);12.06＋5.07＋2.9430.34＋9.76－10.34×3÷×325×7×434÷4÷1.71.25÷×0.8102×7.3÷5.117+-71－－933-15.7-4.341.06－19.72－20.287－3+8+2-11+7+3（二）a×b×c=a×(b×c),a×b÷c=a×(b÷c),a÷b÷c=a÷(b×c),a÷b×c=a÷(b÷c),700÷14÷518.6÷2.5÷0.41.96÷0.5÷41.06×2.5×413×÷29÷×（三）a+(b+c)=a+b+ca+(b-c)=a+b-ca–(b-c)=a-b+ca-(b+c)=a-b-c;19.68－（2.68＋2.97）5.68＋（5.39＋4.32）19.68－（2.97＋9.68）7+(-)5-(-)（四）a×(b×c)=a×b×c,a×(b÷c)=a×b÷c,a÷(b×c)=a÷b÷c,a÷(b÷c)=a÷b×c,1.25×（8÷0.5）0.25×（4×1.2）1.25×（213×0.8）9.3÷(4÷)0.74÷(71×)24×(--+)(12+)×7（7-）×0.92×1.41＋0.92×8.59×-×1.3×11.6－1.6×1.3×11.6＋18.4×9999+999+99+94821-9983.2×12.5×251.25×883.6×0.257.6÷0.253.5÷0.1251.8×99＋1.83.8×9.9＋0.38×103-×2-1.01×9.6102×0.872.6×9.9×31+×+÷×36×3813.5×27+13.5×72+13.51.5×7.4+0.6×150%+2÷5.3×+2.7×25%0.67×10.1－6.728×21.6－2.8×165.6×1.7＋0.56×83