621−143=
\( 6\frac{1}{2}-1\frac{3}{4}= \)
\( 3\frac{7}{15}-2\frac{1}{5}= \)
\( 6\frac{3}{8}+2\frac{3}{4}= \)
\( 7\frac{2}{4}+3\frac{1}{4}= \)
\( 3\frac{1}{2}+1\frac{2}{6}= \)
\( 2\frac{1}{6}+2\frac{2}{3}= \)
\( 3\frac{1}{2}+8\frac{3}{4}= \)
\( 6\frac{5}{14}-2\frac{1}{7}= \)
\( 2\frac{7}{9}+1\frac{1}{3}= \)
\( 13\frac{3}{10}+2\frac{1}{2}= \)