Question

Решите удобным способом

Answer 1

Ж) 7,3*9,08 + 5,3*13,303 - 7,3*8,78 - 5,3*10,003 = 125,7118

1) 7,3*9,08 = 66,284

2) 5,3*13,303 = 70,5059

3) 7,3*8,78 = 64,094

4) 5,3*10,003 = 53,0159

5) 66,284+70,5059 = 136,7899

6) 64,094-53,0159 = 11,0781

7) 136,7899-11,0781 = 125,7118

М) $(-5,17 : \frac{7}{4} + 1,67 * \frac{4}{7}) * (-\frac{12}{11}) = 2\frac{1217}{5775}$

1) $-\frac{517}{100} * \frac{4}{7} = -\frac{517}{175}$

2) $\frac{167}{100} * \frac{4}{7} = \frac{167}{175}$

3) $-\frac{517}{175} + \frac{167}{175} = -\frac{350}{175} = -2$

4) $-\frac{2}{1} * (-\frac{12}{11}) = \frac{24}{11} = 2\frac{2}{11}$      

К) $(7,42 * \frac{5}{9} + 11,48 : \frac{9}{5}) : 0,35 = 30$

1) $\frac{742}{100} * \frac{5}{9} = \frac{742}{180}$

2) $\frac{1148}{100} * \frac{5}{9} = \frac{1148}{180}$

3) $\frac{742}{180} + \frac{1148}{180} = \frac{1890}{180} = 10,5$

4) 10,5:0,35 = 30    

Н) $0,815 * (-\frac{2}{3}) - \frac{1}{6} * (-4,385) + 0,815 * \frac{1}{6} - (-4,385) * (-\frac{2}{3}) = -2,6$

1) $\frac{815}{1000} * (-\frac{2}{3}) = -\frac{815}{1500}$

2) $\frac{1}{6} * (-\frac{4385}{1000}) = -\frac{4385}{6000}$

3) $\frac{815}{1000} * \frac{1}{6} = \frac{815}{6000}$

4) $(-\frac{4385}{1000}) * (-\frac{2}{3}) = \frac{4385}{1500}$

5) $-\frac{815}{1500} + \frac{4385}{6000} = -\frac{3260}{6000} + \frac{4385}{6000} = \frac{1125}{6000} = 0,1875$

6) $\frac{815}{6000} - \frac{4385}{1500} = \frac{815}{6000} - \frac{17540}{6000} = -\frac{16725}{6000} = -2,7875$

7) 0,1875 - 2,7875 = -2,6