北师大版五上：假分数、带分数、整数的互化

 $\frac{21}{49}=$                    $\frac{18}{30}=$                     $\frac{52}{26}=$                  $\frac{13}{91}=$

$\frac{12}{30}$         $\frac{5}{2}$          $\frac{36}{40}$            $\frac{3}{5}$           $\frac{49}{70}$

$\frac{3}{4}=\frac{9}{\left(\right)}=\frac{\left(\right)}{16}$                      $\frac{40}{24}=\frac{5}{\left(\right)}=\frac{\left(\right)}{12}$

$\frac{9}{\left(\right)}=\frac{1}{6}=\frac{\left(\right)}{36}$                      $\frac{6}{\left(\right)}=\frac{2}{6}=\frac{\left(\right)}{3}$

$\frac{3}{5}$=$\frac{3\times ( )}{5\times ( )}$=$\frac{6}{10}$

$\frac{1}{5}$＝        $\frac{6}{20}$＝          $\frac{5}{50}$＝

$\frac{\text{4}}{\text{12}}$ =        $\frac{\text{8}}{\text{24}}$ =       $\frac{\text{6}}{\text{30}}$ =        $\frac{\text{9}}{\text{36}}$ =

$\frac{\text{7}}{\text{91}}$ =        $\frac{\text{18}}{\text{54}}$ =       $\frac{\text{12}}{\text{60}}$ =        $\frac{\text{11}}{\text{55}}$ =

$\frac{3}{9}$ =            $\frac{\text{4}}{\text{16}}$ =           $\frac{5}{7}$ =            $\frac{9}{\text{5}}$

$\frac{3}{2}$ ＝            $\frac{1}{5}$ ＝

$\frac{6}{20}$ ＝          $\frac{24}{30}$ ＝

$\frac{2}{5}$ =           $\frac{3}{7}$ =            $\frac{4}{9}$ =         $\frac{24}{20}$ =

$\frac{60}{35}$ =          $\frac{72}{60}$ =          $\frac{60}{25}$ =         $\frac{6}{7}$ =