Question

简便计算 26.39x36+26.39x83-26.39x19 = 3.45x6.8+65.5x0.68= 1240x3.8+124x51+1.24x1100=

简便计算0.035x935+0.035+3x0.035+0.035x61x0.5=
15.37x7.88-9.37x7.83+1.537x21.2-93.7x0.262=
2005x2005-2004x2006

Answer 1

26.39x36+26.39x83-26.39x19 =26.39x（36+83-19）=26.39x100=2639
3.45x6.8+65.5x0.68=3.45x6.8+6.55x6.8=6.8x10=68
1240x3.8+124x51+1.24x1100=124x38+124x51+124x11=124x100=12400
0.035x935+0.035+3x0.035+0.035x61x0.5=0.035x(935+1+3+30.5)=0.035x969.5=33.9325
15.37x7.88-9.37x7.83+1.537x21.2-93.7x0.262=15.37x10-9.37x10=60
2005x2005-2004x2006=2005x2005-(2005+1)x(2005-1)=2005^2-2005^2+1=1

Answer 2

26.39x36+26.39x83-26.39x19 =26.39x（36+83-19）=26.39x100=2639
3.45x6.8+65.5x0.68=3.45x6.8+6.55x6.8=6.8x10=68
1240x3.8+124x51+1.24x1100=124x38+124x51+124x11=124x100=12400
0.035x935+0.035+3x0.035+0.035x61x0.5=0.035x(935+1+3+30.5)=0.035x969.5=33.9325
15.37x7.88-9.37x7.83+1.537x21.2-93.7x0.262=15.37x10-9.37x10=60
2005x2005-2004x2006=2005x2005-(2005+1)x(2005-1)=2005^2-2005^2+1=1
采纳呗~

Answer 3

0.035x935+0.035+3x0.035+0.035x61x0.5=0.035x(935+1+61X0.5)=0.035x966.5=0.035x1000-0.035x33.5=35-1.1725=33.8275
15.37x7.88-9.37x7.83+1.537x21.2-93.7x0.262=15.37x(7.88+2.12)-9.37x(7.83+2.62)=153.7-9.37=144.33
2005x2005-2004x2006=2004x2005+2005-2004x2006=2004x(2005-2006)+2005=-2004+2005=1

Answer 4

26.39x(36+83-19)=26.39x100=2639
6.8x(3.45+6.55)=68
124x(38+51+11)=12400