38.3x7.6+11x9.25+427x0.24
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38.3x7.6+11x9.25+427x0.2438.3x7.6+11x9.25+427x0.2438.3x7.6+11x9.25+427x0.2438.3x7.6+11x9.25+427x0.24
38.3x7.6+11x9.25+427x0.24
38.3x7.6+11x9.25+427x0.24
38.3x7.6+11x9.25+427x0.24
38.3x7.6+11x9.25+427x0.24
=38.3x7.6+11x9.25+42.7x2.4
=38.3x7.6+1.1x92.5+38.3x2.4+4.4×2.4
=38.3×（7.6+2.4）+1.1×92.5+1.1×9.6
=38.3×10+1.1×（92.5+9.6）
=383+1.1×102.1
=383+112.31
=495.31
38.3x7.6+11x9.25+427x0.24
数学题所有的要过程3/5X2/11+2/11÷5/2 48X(1/2+5/6+3/8) 2又5/8X9.25+7又3/8X9又1/47/9÷11/8X(1/4+2/3) 7/18÷[(5/7-1/3X7/16] 请不要嫌麻烦
1/5x7+1/7x9+1/9x11+1/11x13+…+1/23x25
(4.5X7.5X9.6)/(1.5X2.5X2.4)= 用简便计算
1+2X3+4X5+6X7+8X9=505请回复
1+2X3+4X5+6X7+8X9=1005运用( ) [ ]
添加（）[ ] {} 1+2X3+4X5+6X7+8X9=1005
填括号使等式成立1+2x3+4x5+6x7+8x9=4455
1+2X3+4X5+6X7+8X9=303
巧算：1x2+2x3+3x4+4x5+5x6+6x7...+8x9
数学建模的LINGO使用问题modelmin=x0+x11+x8+x9;x0+x1+x2+x3+x4+x5+x6+x7+x8+x9+x10+x11=11;x0+x1+x3+x4>=4;x1+x2+x4+x5>=4;x2+x3+x5+x6>=4;x3+x4+x6+x7>=3;x4+x5+x7+x8>=3;x5+x6+x8+x9>=4;x6+x7+x9+x10>=4;x7+x8+x10+x11>=2;x8+x9+x11+x0>=2;x9+x10+x0+x1>=1;
2/3+2/3x5+2/5x7+2/7x9+2/9x11+2/11x13=?
1 / (5x7) +1 / (7x9) +1 / (9x11)+ 1 / (11x13)+ 1 / (13x15)不能只有答案,
1/1x3+1/3x5+1/5x7+1/7x9+1/9x11+1/11x13=
1x2+2x3+3x4+4x5+5x6+6x7+7x8+8x9+9x10+10x11
1x2+2x3+3x4+4x5+5x6+6x7+7x8+8x9=
1x9+2=11,12x9+3=111,123x9+4=1111,求12345X9+6=?,1234567X9+?=11111111.
2x2/1x3+4x4/3x5+6x6/5x7+8x8/7x9+10x10/9x11+12x12/11x13 仔细看看 给50啊