计算下列各题并写出简算过程：1．6.734－1.536＋3.266－4.4642．0.8÷0.1253．89.1＋90.3＋88.6＋92.1＋88.9＋90.84．4.83×0.59＋0.41×1.59－0.324×5.95．37.5×21.5×0.112＋35.5×12.5×0.1126.199.9×19

Question

计算下列各题并写出简算过程：　　1．6.734－1.536＋3.266－4.464　　2．0.8÷0.125
3．89.1＋90.3＋88.6＋92.1＋88.9＋90.8
　　4．4.83×0.59＋0.41×1.59－0.324×5.9
　　5．37.5×21.5×0.112＋35.5×12.5×0.112
6 .199.9×19.98-199.8×19.97 7.23.75×3.987+6.013×92.07+6.832×39.87

Answer 1

1.利用交换律和结合律：6.734-1.536+3.266-4.464=6.734+3.266-(1.536+4.464)=9-6=3;2.把0.125转换成分数：0.8/0.125=0.8÷(1/8)=0.8*8=6.43.从上面的数据可知,这些数都在90附近:89.1＋90.3＋88.6＋92.1＋88.9＋90.8=...