100 道 简 便 运 算 带 答 案 简 单 例题 1、34×3.535-3.5×34.34 =34×3.5×1.01-3.5×34×1.01 =0 2、8+89+899+8999+89999 =9+90+900+9000+90000-5 =99999-5 =99994 3、0.67×2.1+0.018×21+8.5×0.79 =0.67×2.1+0.18×2.1+8.5×0.79 =( 0.67+0.18) ×2.1+8.5×0.79 =0.85×2.1+0.85×7.9 =0.85×( 2.1+7.9) =0.85×10 =8.5 4、22222.2×9.99999 =22222.2×( 10-0.00001) =222222-0.222222 =222221.777778 5、1997×19961996-1996×19971997 =1997×1996×10001-1996×1997×10001 =0 6、0.02+0.04+0.06+0.08+……+19.94+19.96+19.98 =( 0.02+19.98) ×999÷2 =10×999 =9990 7、99999×77778+33333×66666 =99999×77778+99999×22222 =99999×( 77778+22222) =99999×100000 =9999900000 8、( 4 又 5/6-3 又 3/4) /( 3/14+2/7) =13/12÷1/2 =13/6 =2 又 1/6 9、( 4.8/1 又 4/5+3 又 1/2+7 又 1/3) *4/9 =( 2 又 2/3+7 又 1/3+3.5) *4/9 =( 10+3.5) *4/9 =13.5*4/9 =6 10、17.2/【 ( 3 又 2/5-1.25) *2/3】 =17.2/【 2.15*2/3】 =17.2÷43/3 =1.2 11、5*5 又 1/5 =5*5+5*1/5 =25+1 =26 12、( 5 又 2/5-1.8) /[( 1.15+13/20) *1 又 2/3] =3.6/[1.8*5/3] =3.6/3 =1.2 13、3 又 5/8*5 又 1/5+5 又 1/5*6 又 3/8 =5.2*(3 又 5/8+6 又 3/8) =5.2*10 =52 14、[3/4-7/8/(5/6+4/5)]*28 =[3/4-7/8÷ 49/30]*28 =[3/4-15/28]*28 =3/4*28-15/28*28 =21-15 =6 15、(1.25*4/5-0.76)/(1 又 3/8+1 又 1/40) =(1-0.76)/2.4 =0.24/2.4 =0.1 16、[(0.2+1/3)*4.5]/(8 又 1/20-6.45) =8/15*4.5/1.6 =2.4/1.6 =1.5 17、8.16-1.26/0.3*1.5 =8.16-4.2*1.5 =8.16-6.3 =1.86 18、8.4*[(1.2+3 又 1/3)/3.4-1/2] =8.4*[68/16/3.4-1/2] =8.4*[5/4-1/2] =8.4*3/4 =6.3 19、19.38-4 又 7/8-5 又 1/8 =1.938-(4 又 7/8+5 又 1/8) =19.38-10 =9.38 20、13 又 7/13-(6 又 3/5+3 又 7/13) =13 又 7/13-3 又 7/13-6 又 3/5 =10-6 又 3/5 =3.4 21、1 又 3/4+[2 又 3/14-( 2 又 3/14-1.875) ]/2 又 1/12 =1 又 3/4-15/8*12/25 =1 又 3/4-9/10 =0.85 22、( 9.4-8 又 2/5) /[( 1.1+1/15) *1 又 7/18] =1/[7/6*2...