Question

17．列豎式計(jì)算．
2.97+15.4=
50-37.4=
6.25×0.42=
6.3÷0.42=

Answer 1

分析 根據(jù)小數(shù)加減乘除法的豎式計(jì)算的方法進(jìn)行計(jì)算．

解答 解：
（1）2.97+15.4=18.37
  $\left.\begin{array}{l}{\;}&{15.4}\\{+}&{\;\;2.97}\end{array}\right.$
   $\overline{\left.\begin{array}{l}{\;}&{18.37}\\{\;}&{\;}\end{array}\right.}$

50-37.4=12.6


6.25×0.42=2.625


6.3÷0.42=15，

點(diǎn)評(píng) 此題考查了小數(shù)加減乘除法的筆算，根據(jù)各自的計(jì)算方法進(jìn)行計(jì)算．