《2025年王朝霞口算小达人六年级数学上册人教版》

方法练 $2.1×\frac {2}{3}= \frac {2.1×2}{3}= $( ) $\frac {4}{5}×1.2= $( )×( )= ( )

答案： 1.4 0.8 1.2 0.96 （横线上方的答案不唯一）

1 直接写出得数。
$\frac {3}{7}×0.21= $ $0.48×\frac {5}{12}= $ $0.28×\frac {3}{28}= $ $0.2×\frac {1}{5}= $
$\frac {3}{4}×3.2= $ $2.1×\frac {8}{7}= $ $2.7×\frac {5}{9}= $ $0.5×\frac {2}{3}= $
$1.5×\frac {2}{3}= $ $1.2×\frac {5}{3}= $ $0.15×\frac {2}{5}= $ $\frac {1}{2}×1.5= $
$\frac {3}{8}×6.4= $ $\frac {5}{18}×0.36= $ $1.4×\frac {4}{7}= $ $0.6×\frac {1}{2}= $
$2.4×\frac {3}{2}= $ $0.36×\frac {7}{4}= $ $4.5×\frac {3}{5}= $ $0.9×\frac {2}{3}= $
$\frac {4}{5}×0.25= $ $\frac {1}{4}×2.08= $ $\frac {5}{7}×0.28= $ $1.5×\frac {1}{5}= $
$3.5×\frac {8}{5}= $ $1.6×\frac {1}{8}= $ $\frac {2}{5}×0.3= $ $1.8×\frac {1}{3}= $
$\frac {3}{8}×2.4= $ $0.7×\frac {3}{5}= $ $\frac {5}{6}×1.2= $ $2.7×\frac {2}{9}= $

答案： 1 0.09 0.2 0.03 0.04 2.4 2.4 1.5 1/3 1 2 0.06 3/4 2.4 0.1 0.8 0.3 3.6 0.63 2.7 0.6 0.2 0.52 0.2 0.3 5.6 0.2 0.12 0.6

2 算一算,填一填。
$\begin{array}{|c|c|c|} \hline 2.1 & & \\ \hline 0.7 & × \frac{1}{7} & \\ \hline 5.6 & & \\ \hline 4.9 & & \\ \hline 7.7 & & \\ \hline 0.63 & & \\ \hline \end{array}\\ \hline $ $\begin{array}{|c|c|c|} \hline 3.2 & & \\ \hline 1.6 & × \frac{3}{8} & \\ \hline 4.8 & & \\ \hline 0.8 & & \\ \hline 0.56 & & \\ \hline 0.72 & & \\ \hline \end{array}\\ \hline $

答案： 2 0.3 0.1 0.8 0.7 1.1 0.09 1.2 0.6 1.8 0.3 0.21 0.27

3 课内应用 妈妈的身高是1.65m,亮亮的身高是妈妈身高的$\frac {4}{5}$。亮亮的身高是( )m。

答案： 3 1.32