Question

6.9×0.83；    
1.05×7.2（得數(shù)保留一位小數(shù)）．

Answer 1

分析：根據(jù)小數(shù)乘法豎式計(jì)算的方法進(jìn)行計(jì)算；注意用四舍五入法保留一位小數(shù)，求出近似數(shù)即可．

解答：解：根據(jù)題意可得：
6.9×0.83=5.727；

1.05×7.2=7.560≈7.6，

點(diǎn)評(píng)：考查了小數(shù)乘法的筆算，根據(jù)其計(jì)算方法進(jìn)行計(jì)算；用四舍五入法保留相應(yīng)的小數(shù)位數(shù)．