Bereken.
1p
\(-\frac{1}{4} ⋅ \frac{2}{5}\)
○
\(-\frac{1}{4} ⋅ \frac{2}{5} = -\frac{2}{20} = -\frac{1}{10}\)
1p
Bereken.
1p
\(\frac{1}{8} ⋅ -6\frac{1}{3}\)
○
\(\frac{1}{8} ⋅ -6\frac{1}{3} = \frac{1}{8} ⋅ -\frac{19}{3} = -\frac{19}{24}\)
1p
Bereken.
1p
\(-1\frac{1}{8} ⋅ -5\frac{1}{2}\)
○
\(-1\frac{1}{8} ⋅ -5\frac{1}{2} = -\frac{9}{8} ⋅ -\frac{11}{2} = \frac{99}{16} = 6\frac{3}{16}\)
1p
Bereken.
1p
\(-7 ⋅ \frac{1}{7}\)
○
\(-7 ⋅ \frac{1}{7} = -\frac{7}{1} ⋅ \frac{1}{7} = -\frac{7}{7} = -\frac{1}{1}\)
1p
Bereken.
1p
\(\frac{1}{9} : -\frac{5}{8}\)
○
\(\frac{1}{9} : -\frac{5}{8} = \frac{1}{9} ⋅ -\frac{8}{5} = -\frac{8}{45}\)
1p
Bereken.
1p
\(3\frac{3}{4} : -\frac{5}{6}\)
○
\(3\frac{3}{4} : -\frac{5}{6} = \frac{15}{4} : -\frac{5}{6} = \frac{15}{4} ⋅ -\frac{6}{5} = -\frac{90}{20} = -\frac{9}{2} = -4\frac{1}{2}\)
1p
Bereken.
1p
\(5\frac{1}{3} : -3\frac{1}{3}\)
○
\(5\frac{1}{3} : -3\frac{1}{3} = \frac{16}{3} : -\frac{10}{3} = \frac{16}{3} ⋅ -\frac{3}{10} = -\frac{48}{30} = -\frac{8}{5} = -1\frac{3}{5}\)
1p
Bereken.
1p
\(-2 : \frac{1}{5}\)
○
\(-2 : \frac{1}{5} = -\frac{2}{1} : \frac{1}{5} = -\frac{2}{1} ⋅ \frac{5}{1} = -\frac{10}{1} = -10\)
1p
Bereken.
1p
\(\frac{3}{5} + \frac{1}{5}\)
○
\(\frac{3}{5} + \frac{1}{5} = \frac{4}{5}\)
1p
Bereken.
1p
\(\frac{4}{9} + \frac{5}{8}\)
○
\(\frac{4}{9} + \frac{5}{8} = {32 \over 72} + {45 \over 72} = \frac{77}{72} = 1\frac{5}{72}\)
1p
Bereken.
1p
\(-\frac{5}{9} - 2\frac{2}{3}\)
○
\(-\frac{5}{9} - 2\frac{2}{3} = -\frac{5}{9} - \frac{8}{3} = {-5 \over 9} - {24 \over 9} = -\frac{29}{9} = -3\frac{2}{9}\)
1p
Bereken.
1p
\(\frac{1}{6} - \frac{7}{9}\)
○
\(\frac{1}{6} - \frac{7}{9} = {3 \over 18} - {14 \over 18} = -\frac{11}{18}\)
1p