\[ 7 \cdot (51 + 29) \]
\[ 7 \cdot 80 \]
\[ 560 \]
\[ 4 \cdot (35 - 20) \]
\[ 4 \cdot 15 \]
\[ 60 \]
\[ \frac{5}{7} \cdot \left( \frac{5}{2} + \frac{1}{5} + \frac{5}{3} - \frac{1}{6} \right) \]
\[ \frac{5}{7} \cdot \left( \frac{75}{30} + \frac{6}{30} + \frac{50}{30} - \frac{5}{30} \right) \]
\[ \frac{5}{7} \cdot \frac{75 + 6 + 50 - 5}{30} = \frac{5}{7} \cdot \frac{126}{30} \]
\[ \frac{1}{7} \cdot \frac{126}{6} = \frac{1}{7} \cdot 21 = 3 \]
\[ 6,7 \cdot (4,3 - 4,4) \]
\[ 6,7 \cdot (-0,1) \]
\[ -0,67 \]
\[ 5,9 \cdot (3,04 - 4,004 + 2,064) \]
\[ 5,9 \cdot (5,104 - 4,004) = 5,9 \cdot 1,1 \]
\[ 6,49 \]
\[ \frac{4}{9} \cdot 5 - \frac{6}{29} \cdot \frac{6}{9} - \frac{4}{9} \cdot 3 + \frac{3}{28} = \frac{4}{9} \cdot (5 - 3) - \frac{36}{261} + \frac{3}{28} \]
\[ \frac{4}{9} \cdot 2 - \frac{4}{29} + \frac{3}{28} = \frac{8}{9} - \frac{4}{29} + \frac{3}{28} \]
\[ \frac{8 \cdot 29 \cdot 28 - 4 \cdot 9 \cdot 28 + 3 \cdot 9 \cdot 29}{7272} = \frac{6496 - 1008 + 783}{7272} = \frac{6271}{7272} \]
\[ 149,17 \]
\[ 308,4 \]
\[ 17,1 \]
\[ (6 - 3 + 6 - 3) + \left( \frac{3}{7} - \frac{2}{11} + \frac{3}{7} - \frac{9}{11} \right) \]
\[ 6 \]
\[ \left( \frac{33}{77} - \frac{14}{77} + \frac{33}{77} - \frac{63}{77} \right) = \frac{33 - 14 + 33 - 63}{77} = \frac{66 - 77}{77} = \frac{-11}{77} = -\frac{1}{7} \]
\[ 6 - \frac{1}{7} = 5 \frac{6}{7} \]
\[ 5,06 \cdot (6,78 - 5,78) \]
\[ 5,06 \cdot 1 \]
\[ 5,06 \]
\[ 3,05 \cdot (2,2 - 2,4) \]
\[ 3,05 \cdot (-0,2) \]
\[ -0,61 \]
\[ 4,5 \cdot (3,4 + 2,26 + 7,34) \]
\[ 4,5 \cdot (5,66 + 7,34) = 4,5 \cdot 13 \]
\[ 58,5 \]
\[ 5 \frac{5}{57} \cdot (6,97 - 11,53) \]
\[ 5 \frac{5}{57} \cdot (-4,56) \]
\[ \frac{5 \cdot 57 + 5}{57} \cdot (-4,56) = \frac{285 + 5}{57} \cdot (-4,56) = \frac{290}{57} \cdot (-4,56) \]
\[ \frac{290}{57} \cdot \left( -\frac{456}{100} \right) = \frac{290 \cdot (-456)}{5700} = \frac{-132240}{5700} \]
\[ -\frac{13224}{570} = -\frac{2204}{95} \approx -23,2 \]
\[ 3 \frac{2}{11} \cdot \left( 6 \frac{2}{7} - 6 \frac{3}{7} \right) \]
\[ 3 \frac{2}{11} \cdot \left( (6-6) + \left( \frac{2}{7} - \frac{3}{7} \right) \right) \]
\[ 3 \frac{2}{11} \cdot \left( 0 - \frac{1}{7} \right) = 3 \frac{2}{11} \cdot \left( -\frac{1}{7} \right) \]
\[ \frac{3 \cdot 11 + 2}{11} \cdot \left( -\frac{1}{7} \right) = \frac{35}{11} \cdot \left( -\frac{1}{7} \right) \]
\[ -\frac{35}{77} = -\frac{5}{11} \]
\[ 22,8 \]
\[ 3,5 \cdot (8,57 + 7,43) \]
\[ 3,5 \cdot 16 \]
\[ 56 \]
\[ (9,13 - 8,13) - (8,7 + 8,7) \]
\[ 1 - 17,4 = -16,4 \]
\[ 4,15 \cdot (3,7 - 4,1) \]
\[ 4,15 \cdot (-0,4) \]
\[ -1,66 \]
\[ 5 \frac{5}{7} \cdot (8,43 + 2,75 - 10,18) \]
\[ 5 \frac{5}{7} \cdot (11,18 - 10,18) = 5 \frac{5}{7} \cdot 1 \]
\[ 5 \frac{5}{7} \]
\[ 7 \frac{2}{9} \cdot \left( 4 \frac{6}{13} + 4 \frac{7}{13} \right) \]
\[ 7 \frac{2}{9} \cdot \left( (4+4) + \left( \frac{6}{13} + \frac{7}{13} \right) \right) \]
\[ 7 \frac{2}{9} \cdot \left( 8 + \frac{13}{13} \right) = 7 \frac{2}{9} \cdot (8 + 1) = 7 \frac{2}{9} \cdot 9 \]
\[ \frac{7 \cdot 9 + 2}{9} \cdot 9 = \frac{63 + 2}{9} \cdot 9 = \frac{65}{9} \cdot 9 = 65 \]
\[ 7 \frac{2}{9} \cdot \left( 4 \frac{6}{13} - 4 \frac{7}{13} \right) \]
\[ 7 \frac{2}{9} \cdot \left( (4-4) + \left( \frac{6}{13} - \frac{7}{13} \right) \right) \]
\[ 7 \frac{2}{9} \cdot \left( 0 - \frac{1}{13} \right) = 7 \frac{2}{9} \cdot \left( -\frac{1}{13} \right) \]
\[ \frac{7 \cdot 9 + 2}{9} \cdot \left( -\frac{1}{13} \right) = \frac{65}{9} \cdot \left( -\frac{1}{13} \right) \]
\[ -\frac{65}{117} = -\frac{5}{9} \]
\[ 7,5 \cdot (6,89 + 5,02 + 1,09) \]
\[ 7,5 \cdot (11,91 + 1,09) = 7,5 \cdot 13 \]
\[ 97,5 \]