《2025年开学了口算笔算天天练三年级数学上册人教版》

$\frac{7}{9}+\frac{1}{9}= $
$\frac{3}{8}+\frac{5}{8}= $
$\frac{2}{3}+\frac{1}{3}= $
$\frac{4}{7}-\frac{3}{7}= $
$\frac{3}{6}-\frac{3}{6}= $
$\frac{2}{9}+\frac{4}{9}= $
$1-\frac{5}{7}= $
$\frac{8}{10}-\frac{5}{10}= $
$\frac{1}{8}+\frac{3}{8}= $
$\frac{4}{6}+\frac{2}{6}= $
$\frac{5}{5}-\frac{2}{5}= $
$\frac{2}{7}-\frac{1}{7}= $
$\frac{3}{9}+\frac{6}{9}= $
$\frac{2}{4}+\frac{2}{4}= $
$1-\frac{1}{2}= $
$\frac{7}{8}-\frac{3}{8}= $

答案： 1.$\frac{8}{9}$ 2.1 3.1 4.$\frac{1}{7}$ 5.0 6.$\frac{6}{9}$ 7.$\frac{2}{7}$ 8.$\frac{3}{10}$ 9.$\frac{4}{8}$ 10.1 11.$\frac{3}{5}$ 12.$\frac{1}{7}$ 13.1 14.1 15.$\frac{1}{2}$ 16.$\frac{4}{8}$

$819×5= $
$\begin{array}{r} \\× \hline \end{array}\hline $
$702×9= $
$\begin{array}{r} \\× \hline \end{array}\hline $
$690×4= $
$\begin{array}{r} \\× \hline \end{array}\hline $
$445×6= $
$\begin{array}{r} \\× \hline \end{array}\hline $
$717×7= $
$\begin{array}{r} \\× \hline \end{array}\hline $
$356×8= $
$\begin{array}{r} \\× \hline \end{array}\hline $
$(27+45)÷8$
$=□÷□$
$=□$
$7×(613-158)$
$=□×□$
$=□$
$845-(462-335)$
$=□-□$
$=□$
建议用时8分钟 实际用时____分钟 做对____题/共25题 评价

答案： $819×5=4095$
$\begin{array}{r}819\\×\ \ \ 5\\\hline4095\end{array}$
$702×9=6318$
$\begin{array}{r}702\\×\ \ \ 9\\\hline6318\end{array}$
$690×4=2760$
$\begin{array}{r}690\\×\ \ \ 4\\\hline2760\end{array}$
$445×6=2670$
$\begin{array}{r}445\\×\ \ \ 6\\\hline2670\end{array}$
$717×7=5019$
$\begin{array}{r}717\\×\ \ \ 7\\\hline5019\end{array}$
$356×8=2848$
$\begin{array}{r}356\\×\ \ \ 8\\\hline2848\end{array}$
$(27+45)÷8$
$=72÷8$
$=9$
$7×(613-158)$
$=7×455$
$=3185$
$845-(462-335)$
$=845-127$
$=718$