Question

14．直接写出得数．

6.2+0.04=	1-$\begin{array}{l}\frac{3}{8}\end{array}$-$\begin{array}{l}\frac{1}{8}\end{array}$=
$\begin{array}{l}\frac{1}{4}\end{array}$-$\begin{array}{l}\frac{1}{5}\end{array}$=	$\begin{array}{l}\frac{9}{10}\end{array}$-$\begin{array}{l}\frac{1}{2}\end{array}$=
3+$\begin{array}{l}\frac{1}{15}\end{array}$=	1.23+0.3=
8÷0.2-8×0.1=	2.5×4=

Answer 1

分析 根据小数和分数加减乘除法运算的计算法则计算即可求解．

解答 解：

6.2+0.04=6.24	1-$\begin{array}{l}\frac{3}{8}\end{array}$-$\begin{array}{l}\frac{1}{8}\end{array}$=$\frac{1}{2}$
$\begin{array}{l}\frac{1}{4}\end{array}$-$\begin{array}{l}\frac{1}{5}\end{array}$=$\frac{1}{20}$	$\begin{array}{l}\frac{9}{10}\end{array}$-$\begin{array}{l}\frac{1}{2}\end{array}$=$\frac{2}{5}$
3+$\begin{array}{l}\frac{1}{15}\end{array}$=3$\begin{array}{l}\frac{1}{15}\end{array}$	1.23+0.3=1.53
8÷0.2-8×0.1=39.2	2.5×4=10

点评 考查了小数和分数加减乘除法运算，关键是熟练掌握计算法则正确进行计算．