《2025年口算训练三年级数学下册北师大版升级版》

$400\div8 - 5 =$ $37 + 40\div4 =$ $6\times20\times3 =$
$4\times30 + 16 =$ $420\div6 + 8 =$ $45 + 20\times6 =$
$408\div8 + 26 =$ $5\times16 + 52 =$ $723 - 30\times8 =$
$210\div3 + 45 =$ $120\div4 + 27 =$ $150\div3 - 6 =$

答案：

$200\div4\times60 =$ $36\div6\times70 =$ $5\times80 + 4 =$
$42\div6\times40 =$ $680\times(7 - 7) =$ $210\div3\times30 =$
$(3 + 7)\times60 =$ $250\div5\times80 =$ $370\div(6 - 5) =$
$400\div8\times6 =$ $3\times90\div6 =$ $480\div6\times7 =$
$(3 + 6)\times31 =$ $560\div7\times4 =$ $16\times5\times7 =$
$160\div4\times8 =$ $9\times30 + 5 =$ $350\div5\times8 =$
$60\times17 =$ $342 - 60 =$ $514 + 37 =$
$630\div3 =$ $400 - 50 =$ $600\div3 =$

答案：

先仔细观察分析,再求出各个图形表示的数。
$\triangle\times\square = 240$, $\triangle = (\ \ \ \ \ )$
$\square\times\square = 3600$, $\square = (\ \ \ \ \ )$
$\bigcirc\div\triangle = 120$ $\bigcirc = (\ \ \ \ \ )$

答案：