2 4/13*(4/5-7/12)-7:3 1/2. Created by slimeotjulia. matematika-ru

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exbntkm23

2 4/13*(4/5-7/12)-7:3 1/2=-1.5

1)4/5-7/12=48/60-35/60=13/60

2)2 4/13*13/60=30/13*13/60=1/2

3)7:3 1/2=7:7/2=7*2/7=2

4)1/2-2=-1.5

78 votes Thanks 109

alex080297

Ответ:

Пошаговое объяснение:

1) $\frac{4}{5}-\frac{7}{12}=\frac{48}{60}-\frac{35}{60}=\frac{13}{60}$

2) $2\frac{4}{13}*\frac{13}{60}=\frac{30}{13}*\frac{13}{60}=\frac{1}{2}$

3) $7:3\frac{1}{2}=\frac{7}{1}:\frac{7}{2}=\frac{7}{1}*\frac{2}{7}=\frac{2}{1}=2$

4) $\frac{1}{2}-2=\frac{1}{2}-\frac{2}{1}=\frac{1}{2}-\frac{4}{2}=-\frac{3}{2}=-1\frac{1}{2}=-1.5$

56 votes Thanks 76

Manman4644 В 3 разве не 1/2?