- 小明求得某7个自然数的平均数等于30.26,后来发现这个小数的小数点后的最后一位数是错误的.则这7个自然数的平均值应约等于__...
- 7.2×1.69+3.14×2.8+1.45×7.2=______.
- 796.75-4.72-96.75-5.28=______.
- .0.00…098732006个0÷0.00…032007个0=______.
- 0.7+9.7+99.7+999.7+9999.7+99999.7+999999.7+9999999.7+99999999.7+999999999.7.
- 7×0.170.37×27×7142.85=______.
- 9.35-(7.35-0.9)
- 3.42×1.5-(0.8+0.5)
- 208.3-3.32+11.7-6.68.
- 若a=0.000…002008个8,b=0.000…002008个0125则:a+b=______;a-b=______;a×b=______;a÷b=______.
- 计算36×1.09+1.2×67.3=______.
- 计算下面各题,能简便计算的要简便计算.0.125×(8×0.8)9.43-(2.43+0.39)(12-15)÷34÷3516÷6+6÷1614×37+47÷420.3×16-4560...
- 设A=0.7+0.77+0.777+0.7777++0.77…710个7,11-A的整数部分是( )A.8B.7C.10D.3
- 1997+199.7+19.97+1.997=______.
- 计算:53.3÷0.23÷0.91×16.1÷0.82=