分数小数加减乘除计算题

1．老师在黑板上写了13个自然数,让小王计算平均数（保留两位小数）,小王计算出的答案上12.43.老师说最后一位数字错了,其他的数字都对.请问正确的答案应该是________.　　2．老王的体重的2/

http://wenku.baidu.com/view/985577f57c1cfad6195fa7c4.html这里面全是初一有理数的混合运算习题,不带答案的

3/7×49/9-4/32.8/9×15/36+1/273.12×5/6–2/9×34.8×5/4+1/45.6÷3/8–3/8÷66.4/7×5/9+3/7×5/97.5/2-（3/2+4/5）8.

3.(23/4-3/4)×(3×6+2)4.3/7×49/9-4/35.8/9×15/36+1/276.12×5/6–2/9×37.8×5/4+1/48.6÷3/8–3/8÷69.4/7×5/9+3/

1.3/7×49/9-4/32.8/9×15/36+1/273.12×5/6–2/9×34.8×5/4+1/45.6÷3/8–3/8÷66.4/7×5/9+3/7×5/97.5/2-（3/2+4/5）

1.3/7×49/9-4/32.8/9×15/36+1/273.12×5/6–2/9×34.8×5/4+1/45.6÷3/8–3/8÷66.4/7×5/9+3/7×5/97.5/2-（3/2+4/5）

30.8÷[14－(9.85＋1.07)][60－(9.5＋28.9)]÷0.182.881÷0.43－0.24×3.520×[(2.44－1.8)÷0.4＋0.15]28-(3.4+1.25×2.4

1.3/7×49/9-4/32.8/9×15/36+1/273.12×5/6–2/9×34.8×5/4+1/45.6÷3/8–3/8÷66.4/7×5/9+3/7×5/97.5/2-（3/2+4/5）

1.=(1/15)/(13/4)+(8/13)*(4/15)+(4/13)/(15/4)=(1/15)*(4/13)+(4/13)*(8/15)+(4/13)*(4/15)=(1/15+8/15+4/

8.6×（4分之9-3分之1）+3.4×（4分之3-3分之1）=8.6×12分之23+3.4×12分之5=5分之43×12分之23+5分之17×12分之5=60分之989+60分之85=10分之179

88+56+12=88+12+56=100+56=156776*125*8=776*(125*8)=776*1000=776000

1.3/7×49/9-4/32.8/9×15/36+1/273.12×5/6–2/9×34.8×5/4+1/45.6÷3/8–3/8÷66.4/7×5/9+3/7×5/97.5/2-（3/2+4/5）

3/4+0.25-25%=0.75+0.25-0.25=0.753/4+1/4-1/4=3/4一般这种题都统一化成分数或小数后再计算.

1.(1+1/2)(1+1/3)(1+1/4).(1+1/100)2.(1-1/2)(1-1/3)(1-1/4).(1-1/100)3.8+2-8+24.25*4/25*45.7.26-(5.26-1

23.5+14.8+36.5=23.5+36.5+14.8=60+14.8=74.819.4+30.6+45.62=50+45.62=95.6233.5+24.9+51.3=58.4+51.3=109

http://zhidao.baidu.com/question/29823872.html?si=1http://zhidao.baidu.com/question/166959040.html?s

3/7×49/9-4/3+5/28/9×15/36-1/27+1/69/19-12/19×5/6+1/31/4+3/4÷2/3-1/28/7×21/16+1/2-1/43/7×49/9-4/3+5/6

76*1/4+23*25/100+0.2510-2.87-7.130.96+9.6*9.97.5-5.7*1/312.37-3.25-6.7516*6.8+2.2*16+16401*19+28458.

1.3/7×49/9-4/32.8/9×15/36+1/273.12×5/6–2/9×34.8×5/4+1/45.6÷3/8–3/8÷66.4/7×5/9+3/7×5/97.5/2-（3/2+4/5）

/7×49/9-4/38/9×15/36+1/2712×5/6–2/9×38×5/4+1/46÷3/8–3/8÷64/7×5/9+3/7×5/95/2-（3/2+4/5）7/8+（1/8+1/9）9×